1466866440 has 192 divisors, whose sum is σ = 5153803200. Its totient is φ = 359686656.

The previous prime is 1466866433. The next prime is 1466866441. The reversal of 1466866440 is 446686641.

1466866440 is a `hidden beast` number, since 146 + 6 + 8 + 66 + 440 = 666.

It is a super-3 number, since 3×1466866440³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (1466866441) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1773307 + ... + 1774133.

It is an arithmetic number, because the mean of its divisors is an integer number (26842725).

Almost surely, 2^1466866440 is an apocalyptic number.

1466866440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1466866440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2576901600).

1466866440 is an abundant number, since it is smaller than the sum of its proper divisors (3686936760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1466866440 is a wasteful number, since it uses less digits than its factorization.

1466866440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236 (or 1229 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 45.

The square root of 1466866440 is about 38299.6924269634. The cubic root of 1466866440 is about 1136.2228638496. Note that the first 3 decimals are identical.

The spelling of 1466866440 in words is "one billion, four hundred sixty-six million, eight hundred sixty-six thousand, four hundred forty".