55665265857 has 4 divisors (see below), whose sum is σ = 74220354480. Its totient is φ = 37110177236.

The previous prime is 55665265841. The next prime is 55665265867. The reversal of 55665265857 is 75856256655.

55665265857 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, 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 55665265857 - 2⁴ = 55665265841 is a prime.

It is a super-3 number, since 3×55665265857³ (a number of 33 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55665265857.

It is not an unprimeable number, because it can be changed into a prime (55665265807) 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, 9277544307 + ... + 9277544312.

It is an arithmetic number, because the mean of its divisors is an integer number (18555088620).

Almost surely, 2^55665265857 is an apocalyptic number.

It is an amenable number.

55665265857 is a deficient number, since it is larger than the sum of its proper divisors (18555088623).

55665265857 is a wasteful number, since it uses less digits than its factorization.

55665265857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18555088622.

The product of its digits is 75600000, while the sum is 60.

The spelling of 55665265857 in words is "fifty-five billion, six hundred sixty-five million, two hundred sixty-five thousand, eight hundred fifty-seven".