55666523641 has 4 divisors (see below), whose sum is σ = 57462217984. Its totient is φ = 53870829300.

The previous prime is 55666523629. The next prime is 55666523669. The reversal of 55666523641 is 14632566655.

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 55666523641 - 2¹⁷ = 55666392569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55666523611) 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, 897847125 + ... + 897847186.

It is an arithmetic number, because the mean of its divisors is an integer number (14365554496).

Almost surely, 2^55666523641 is an apocalyptic number.

It is an amenable number.

55666523641 is a deficient number, since it is larger than the sum of its proper divisors (1795694343).

55666523641 is a wasteful number, since it uses less digits than its factorization.

55666523641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1795694342.

The product of its digits is 3888000, while the sum is 49.

The spelling of 55666523641 in words is "fifty-five billion, six hundred sixty-six million, five hundred twenty-three thousand, six hundred forty-one".