55660907 has 4 divisors (see below), whose sum is σ = 58935096. Its totient is φ = 52386720.

The previous prime is 55660901. The next prime is 55660919. The reversal of 55660907 is 70906655.

55660907 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55660907 - 2²⁰ = 54612331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55660901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1637069 + ... + 1637102.

It is an arithmetic number, because the mean of its divisors is an integer number (14733774).

Almost surely, 2^55660907 is an apocalyptic number.

55660907 is a deficient number, since it is larger than the sum of its proper divisors (3274189).

55660907 is a wasteful number, since it uses less digits than its factorization.

55660907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3274188.

The product of its (nonzero) digits is 56700, while the sum is 38.

The square root of 55660907 is about 7460.6237674875. The cubic root of 55660907 is about 381.8124564815.

The spelling of 55660907 in words is "fifty-five million, six hundred sixty thousand, nine hundred seven".