15001165566 has 24 divisors (see below), whose sum is σ = 32553098760. Its totient is φ = 4992608016.

The previous prime is 15001165561. The next prime is 15001165573. The reversal of 15001165566 is 66556110051.

It is a self number, because there is not a number n which added to its sum of digits gives 15001165566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15001165561) 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 11 ways as a sum of consecutive naturals, for example, 636481 + ... + 659628.

It is an arithmetic number, because the mean of its divisors is an integer number (1356379115).

Almost surely, 2^15001165566 is an apocalyptic number.

15001165566 is an abundant number, since it is smaller than the sum of its proper divisors (17551933194).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15001165566 is a wasteful number, since it uses less digits than its factorization.

15001165566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1296760 (or 1296757 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The spelling of 15001165566 in words is "fifteen billion, one million, one hundred sixty-five thousand, five hundred sixty-six".