166726400202 has 24 divisors (see below), whose sum is σ = 382489977636. Its totient is φ = 52306321536.

The previous prime is 166726400201. The next prime is 166726400209. The reversal of 166726400202 is 202004627661.

166726400202 is a `hidden beast` number, since 1 + 6 + 6 + 7 + 2 + 640 + 0 + 2 + 0 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 152364534921 + 14361865281 = 390339^2 + 119841^2 .

It is not an unprimeable number, because it can be changed into a prime (166726400201) 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, 272428453 + ... + 272429064.

Almost surely, 2^166726400202 is an apocalyptic number.

166726400202 is an abundant number, since it is smaller than the sum of its proper divisors (215763577434).

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

166726400202 is a wasteful number, since it uses less digits than its factorization.

166726400202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544857542 (or 544857539 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The spelling of 166726400202 in words is "one hundred sixty-six billion, seven hundred twenty-six million, four hundred thousand, two hundred two".