166722200523 has 12 divisors (see below), whose sum is σ = 243159025200. Its totient is φ = 110069024976.

The previous prime is 166722200509. The next prime is 166722200537. The reversal of 166722200523 is 325002227661.

166722200523 is a `hidden beast` number, since 1 + 66 + 72 + 2 + 2 + 0 + 0 + 523 = 666.

It is an interprime number because it is at equal distance from previous prime (166722200509) and next prime (166722200537).

It is not a de Polignac number, because 166722200523 - 2¹⁰ = 166722199499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166722200563) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 89924748 + ... + 89926601.

It is an arithmetic number, because the mean of its divisors is an integer number (20263252100).

Almost surely, 2^166722200523 is an apocalyptic number.

166722200523 is a deficient number, since it is larger than the sum of its proper divisors (76436824677).

166722200523 is a wasteful number, since it uses less digits than its factorization.

166722200523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179851458 (or 179851455 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The spelling of 166722200523 in words is "one hundred sixty-six billion, seven hundred twenty-two million, two hundred thousand, five hundred twenty-three".