166191522 has 16 divisors (see below), whose sum is σ = 379866432. Its totient is φ = 47483280.

The previous prime is 166191497. The next prime is 166191523. The reversal of 166191522 is 225191661.

166191522 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (166191523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1978429 + ... + 1978512.

It is an arithmetic number, because the mean of its divisors is an integer number (23741652).

Almost surely, 2^166191522 is an apocalyptic number.

166191522 is an abundant number, since it is smaller than the sum of its proper divisors (213674910).

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

166191522 is a wasteful number, since it uses less digits than its factorization.

166191522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3956953.

The product of its digits is 6480, while the sum is 33.

The square root of 166191522 is about 12891.5290792055. The cubic root of 166191522 is about 549.7977460190.

The spelling of 166191522 in words is "one hundred sixty-six million, one hundred ninety-one thousand, five hundred twenty-two".