55501101661 has 4 divisors (see below), whose sum is σ = 55697218912. Its totient is φ = 55304984412.

The previous prime is 55501101629. The next prime is 55501101673. The reversal of 55501101661 is 16610110555.

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 55501101661 - 2⁵ = 55501101629 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 (55501105661) 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, 98058201 + ... + 98058766.

It is an arithmetic number, because the mean of its divisors is an integer number (13924304728).

Almost surely, 2^55501101661 is an apocalyptic number.

It is an amenable number.

55501101661 is a deficient number, since it is larger than the sum of its proper divisors (196117251).

55501101661 is a wasteful number, since it uses less digits than its factorization.

55501101661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196117250.

The product of its (nonzero) digits is 4500, while the sum is 31.

The spelling of 55501101661 in words is "fifty-five billion, five hundred one million, one hundred one thousand, six hundred sixty-one".