55661107 has 2 divisors, whose sum is σ = 55661108. Its totient is φ = 55661106.

The previous prime is 55661087. The next prime is 55661129. The reversal of 55661107 is 70116655.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55661107 is a prime.

It is not a weakly prime, because it can be changed into another prime (55661147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27830553 + 27830554.

It is an arithmetic number, because the mean of its divisors is an integer number (27830554).

Almost surely, 2^55661107 is an apocalyptic number.

55661107 is a deficient number, since it is larger than the sum of its proper divisors (1).

55661107 is an equidigital number, since it uses as much as digits as its factorization.

55661107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 55661107 is about 7460.6371711805. The cubic root of 55661107 is about 381.8129137887.

The spelling of 55661107 in words is "fifty-five million, six hundred sixty-one thousand, one hundred seven".