1662554880 has 432 divisors, whose sum is σ = 6715275840. Its totient is φ = 371884032.

The previous prime is 1662554867. The next prime is 1662554903. The reversal of 1662554880 is 884552661.

1662554880 is a `hidden beast` number, since 1 + 6 + 6 + 25 + 548 + 80 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4273726 + ... + 4274114.

It is an arithmetic number, because the mean of its divisors is an integer number (15544620).

Almost surely, 2^1662554880 is an apocalyptic number.

1662554880 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 1662554880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3357637920).

1662554880 is an abundant number, since it is smaller than the sum of its proper divisors (5052720960).

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

1662554880 is a wasteful number, since it uses less digits than its factorization.

1662554880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476 (or 459 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 45.

The square root of 1662554880 is about 40774.4390519355. The cubic root of 1662554880 is about 1184.6552861564.

The spelling of 1662554880 in words is "one billion, six hundred sixty-two million, five hundred fifty-four thousand, eight hundred eighty".