55664477 has 12 divisors (see below), whose sum is σ = 64786428. Its totient is φ = 47625600.

The previous prime is 55664473. The next prime is 55664527. The reversal of 55664477 is 77446655.

It can be written as a sum of positive squares in 2 ways, for example, as 24068836 + 31595641 = 4906^2 + 5621^2 .

It is not a de Polignac number, because 55664477 - 2² = 55664473 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55664473) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11474 + ... + 15587.

It is an arithmetic number, because the mean of its divisors is an integer number (5398869).

Almost surely, 2^55664477 is an apocalyptic number.

It is an amenable number.

55664477 is a deficient number, since it is larger than the sum of its proper divisors (9121951).

55664477 is a wasteful number, since it uses less digits than its factorization.

55664477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27100 (or 27089 counting only the distinct ones).

The product of its digits is 705600, while the sum is 44.

The square root of 55664477 is about 7460.8630197853. The cubic root of 55664477 is about 381.8206192502.

The spelling of 55664477 in words is "fifty-five million, six hundred sixty-four thousand, four hundred seventy-seven".