660615131 has 16 divisors (see below), whose sum is σ = 772339968. Its totient is φ = 558914400.

The previous prime is 660615091. The next prime is 660615167. The reversal of 660615131 is 131516066.

It is not a de Polignac number, because 660615131 - 2¹⁰ = 660614107 is a prime.

It is a super-2 number, since 2×660615131² = 872824702612294322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 660615094 and 660615103.

It is not an unprimeable number, because it can be changed into a prime (660615031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25925 + ... + 44646.

It is an arithmetic number, because the mean of its divisors is an integer number (48271248).

Almost surely, 2^660615131 is an apocalyptic number.

660615131 is a deficient number, since it is larger than the sum of its proper divisors (111724837).

660615131 is a wasteful number, since it uses less digits than its factorization.

660615131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70642.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 660615131 is about 25702.4343399609. The cubic root of 660615131 is about 870.9291746219.

The spelling of 660615131 in words is "six hundred sixty million, six hundred fifteen thousand, one hundred thirty-one".