55665021556011 has 32 divisors (see below), whose sum is σ = 85517425143808. Its totient is φ = 31548788301600.

The previous prime is 55665021556007. The next prime is 55665021556013. The reversal of 55665021556011 is 11065512056655.

It is not a de Polignac number, because 55665021556011 - 2² = 55665021556007 is a prime.

It is a super-2 number, since 2×55665021556011² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55665021556013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11611441 + ... + 15689346.

It is an arithmetic number, because the mean of its divisors is an integer number (2672419535744).

Almost surely, 2^{55665021556011} is an apocalyptic number.

55665021556011 is a deficient number, since it is larger than the sum of its proper divisors (29852403587797).

55665021556011 is a wasteful number, since it uses less digits than its factorization.

55665021556011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27301591.

The product of its (nonzero) digits is 1350000, while the sum is 48.

The spelling of 55665021556011 in words is "fifty-five trillion, six hundred sixty-five billion, twenty-one million, five hundred fifty-six thousand, eleven".