1660687392 has 96 divisors (see below), whose sum is σ = 5365325952. Its totient is φ = 437981184.

The previous prime is 1660687387. The next prime is 1660687403. The reversal of 1660687392 is 2937860661.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×1660687392² = 5515765227895523328, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 86313 + ... + 103784.

It is an arithmetic number, because the mean of its divisors is an integer number (55888812).

Almost surely, 2^1660687392 is an apocalyptic number.

1660687392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1660687392 is an abundant number, since it is smaller than the sum of its proper divisors (3704638560).

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

1660687392 is a wasteful number, since it uses less digits than its factorization.

1660687392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190130 (or 190122 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 48.

The square root of 1660687392 is about 40751.5323883655. The cubic root of 1660687392 is about 1184.2115597731.

The spelling of 1660687392 in words is "one billion, six hundred sixty million, six hundred eighty-seven thousand, three hundred ninety-two".