55664501 has 4 divisors (see below), whose sum is σ = 55687500. Its totient is φ = 55641504.

The previous prime is 55664473. The next prime is 55664527. The reversal of 55664501 is 10546655.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11122225 + 44542276 = 3335^2 + 6674^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55664501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55664801) 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, 7376 + ... + 12873.

It is an arithmetic number, because the mean of its divisors is an integer number (13921875).

Almost surely, 2^55664501 is an apocalyptic number.

It is an amenable number.

55664501 is a deficient number, since it is larger than the sum of its proper divisors (22999).

55664501 is a wasteful number, since it uses less digits than its factorization.

55664501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22998.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 55664501 is about 7460.8646281782. The cubic root of 55664501 is about 381.8206741248.

It can be divided in two parts, 55664 and 501, that added together give a palindrome (56165).

The spelling of 55664501 in words is "fifty-five million, six hundred sixty-four thousand, five hundred one".