660115616 has 12 divisors (see below), whose sum is σ = 1299602682. Its totient is φ = 330057792.

The previous prime is 660115601. The next prime is 660115619. The reversal of 660115616 is 616511066.

It can be written as a sum of positive squares in only one way, i.e., 654336400 + 5779216 = 25580^2 + 2404^2 .

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 20628613 = 660115616 / (6 + 6 + 0 + 1 + 1 + 5 + 6 + 1 + 6).

It is not an unprimeable number, because it can be changed into a prime (660115619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10314275 + ... + 10314338.

Almost surely, 2^660115616 is an apocalyptic number.

It is an amenable number.

660115616 is a deficient number, since it is larger than the sum of its proper divisors (639487066).

660115616 is a wasteful number, since it uses less digits than its factorization.

660115616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20628623 (or 20628615 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 660115616 is about 25692.7152321431. The cubic root of 660115616 is about 870.7096055855.

The spelling of 660115616 in words is "six hundred sixty million, one hundred fifteen thousand, six hundred sixteen".