1560660665 has 32 divisors (see below), whose sum is σ = 2044828800. Its totient is φ = 1138959360.

The previous prime is 1560660623. The next prime is 1560660667. The reversal of 1560660665 is 5660660651.

It is a de Polignac number, because none of the positive numbers 2^k-1560660665 is a prime.

It is a super-2 number, since 2×1560660665² = 4871323422556484450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1560660667) 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, 1771025 + ... + 1771905.

It is an arithmetic number, because the mean of its divisors is an integer number (63900900).

Almost surely, 2^1560660665 is an apocalyptic number.

It is an amenable number.

1560660665 is a deficient number, since it is larger than the sum of its proper divisors (484168135).

1560660665 is a wasteful number, since it uses less digits than its factorization.

1560660665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1577.

The product of its (nonzero) digits is 194400, while the sum is 41.

The square root of 1560660665 is about 39505.1979491307. The cubic root of 1560660665 is about 1159.9416996561.

The spelling of 1560660665 in words is "one billion, five hundred sixty million, six hundred sixty thousand, six hundred sixty-five".