55660615 has 4 divisors (see below), whose sum is σ = 66792744. Its totient is φ = 44528488.

The previous prime is 55660607. The next prime is 55660681. The reversal of 55660615 is 51606655.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51606655 = 5 ⋅10321331.

It is a cyclic number.

It is not a de Polignac number, because 55660615 - 2³ = 55660607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 5566057 + ... + 5566066.

It is an arithmetic number, because the mean of its divisors is an integer number (16698186).

Almost surely, 2^55660615 is an apocalyptic number.

55660615 is a deficient number, since it is larger than the sum of its proper divisors (11132129).

55660615 is a wasteful number, since it uses less digits than its factorization.

55660615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11132128.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 55660615 is about 7460.6041980526. The cubic root of 55660615 is about 381.8117888111.

The spelling of 55660615 in words is "fifty-five million, six hundred sixty thousand, six hundred fifteen".