15665166055 has 32 divisors (see below), whose sum is σ = 23444080128. Its totient is φ = 9762230400.

The previous prime is 15665166043. The next prime is 15665166059. The reversal of 15665166055 is 55066156651.

It is not a de Polignac number, because 15665166055 - 2¹⁹ = 15664641767 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15665165996 and 15665166014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15665166059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2299284 + ... + 2306086.

It is an arithmetic number, because the mean of its divisors is an integer number (732627504).

Almost surely, 2^15665166055 is an apocalyptic number.

15665166055 is a deficient number, since it is larger than the sum of its proper divisors (7778914073).

15665166055 is a wasteful number, since it uses less digits than its factorization.

15665166055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12807.

The product of its (nonzero) digits is 810000, while the sum is 46.

The spelling of 15665166055 in words is "fifteen billion, six hundred sixty-five million, one hundred sixty-six thousand, fifty-five".