1660157952 has 76 divisors (see below), whose sum is σ = 4429176576. Its totient is φ = 553123840.

The previous prime is 1660157929. The next prime is 1660157977. The reversal of 1660157952 is 2597510661.

It is a super-2 number, since 2×1660157952² = 5512248851177668608, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 785377 + ... + 787487.

Almost surely, 2^1660157952 is an apocalyptic number.

1660157952 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 1660157952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2214588288).

1660157952 is an abundant number, since it is smaller than the sum of its proper divisors (2769018624).

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

1660157952 is an frugal number, since it uses more digits than its factorization.

1660157952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2150 (or 2116 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 42.

The square root of 1660157952 is about 40745.0359185018. The cubic root of 1660157952 is about 1184.0857011255.

The spelling of 1660157952 in words is "one billion, six hundred sixty million, one hundred fifty-seven thousand, nine hundred fifty-two".