55664061 has 4 divisors (see below), whose sum is σ = 74218752. Its totient is φ = 37109372.

The previous prime is 55664057. The next prime is 55664083. The reversal of 55664061 is 16046655.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55664061 - 2² = 55664057 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55664051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9277341 + ... + 9277346.

It is an arithmetic number, because the mean of its divisors is an integer number (18554688).

Almost surely, 2^55664061 is an apocalyptic number.

It is an amenable number.

55664061 is a deficient number, since it is larger than the sum of its proper divisors (18554691).

55664061 is a wasteful number, since it uses less digits than its factorization.

55664061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18554690.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 55664061 is about 7460.8351409209. The cubic root of 55664061 is about 381.8196680884.

The spelling of 55664061 in words is "fifty-five million, six hundred sixty-four thousand, sixty-one".