1660657152 has 320 divisors, whose sum is σ = 5813913600. Its totient is φ = 408084480.

The previous prime is 1660657151. The next prime is 1660657181. The reversal of 1660657152 is 2517560661.

It is a super-2 number, since 2×1660657152² = 5515564352977502208, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1660657152.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660657151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2246799 + ... + 2247537.

It is an arithmetic number, because the mean of its divisors is an integer number (18168480).

Almost surely, 2^1660657152 is an apocalyptic number.

1660657152 is a gapful number since it is divisible by the number (12) 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 1660657152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2906956800).

1660657152 is an abundant number, since it is smaller than the sum of its proper divisors (4153256448).

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

1660657152 is a wasteful number, since it uses less digits than its factorization.

1660657152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797 (or 781 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 1660657152 is about 40751.1613576840. The cubic root of 1660657152 is about 1184.2043718309.

The spelling of 1660657152 in words is "one billion, six hundred sixty million, six hundred fifty-seven thousand, one hundred fifty-two".