55101625666661 has 24 divisors (see below), whose sum is σ = 65651323811040. Its totient is φ = 46098204479712.

The previous prime is 55101625666649. The next prime is 55101625666709. The reversal of 55101625666661 is 16666652610155.

It is not a de Polignac number, because 55101625666661 - 2¹⁰ = 55101625665637 is a prime.

It is a super-2 number, since 2×55101625666661² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55101625666597 and 55101625666606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55101625666621) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76632635 + ... + 77348328.

It is an arithmetic number, because the mean of its divisors is an integer number (2735471825460).

Almost surely, 2^{55101625666661} is an apocalyptic number.

It is an amenable number.

55101625666661 is a deficient number, since it is larger than the sum of its proper divisors (10549698144379).

55101625666661 is a wasteful number, since it uses less digits than its factorization.

55101625666661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153981153 (or 153981146 counting only the distinct ones).

The product of its (nonzero) digits is 11664000, while the sum is 56.

The spelling of 55101625666661 in words is "fifty-five trillion, one hundred one billion, six hundred twenty-five million, six hundred sixty-six thousand, six hundred sixty-one".