1666872480 has 384 divisors, whose sum is σ = 6676217856. Its totient is φ = 340070400.

The previous prime is 1666872479. The next prime is 1666872497. The reversal of 1666872480 is 842786661.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1353465 + ... + 1354695.

It is an arithmetic number, because the mean of its divisors is an integer number (17385984).

Almost surely, 2^1666872480 is an apocalyptic number.

1666872480 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 1666872480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3338108928).

1666872480 is an abundant number, since it is smaller than the sum of its proper divisors (5009345376).

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

1666872480 is a wasteful number, since it uses less digits than its factorization.

1666872480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1300 (or 1292 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 48.

The square root of 1666872480 is about 40827.3496568171. The cubic root of 1666872480 is about 1185.6799032258.

The spelling of 1666872480 in words is "one billion, six hundred sixty-six million, eight hundred seventy-two thousand, four hundred eighty".