68166522 has 20 divisors (see below), whose sum is σ = 152743866. Its totient is φ = 22722120.

The previous prime is 68166521. The next prime is 68166523. The reversal of 68166522 is 22566186.

It is an interprime number because it is at equal distance from previous prime (68166521) and next prime (68166523).

It can be written as a sum of positive squares in only one way, i.e., 57017601 + 11148921 = 7551^2 + 3339^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (68166521) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 210229 + ... + 210552.

Almost surely, 2^68166522 is an apocalyptic number.

68166522 is an abundant number, since it is smaller than the sum of its proper divisors (84577344).

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

68166522 is a wasteful number, since it uses less digits than its factorization.

68166522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420795 (or 420786 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 68166522 is about 8256.3019566874. The cubic root of 68166522 is about 408.4984176956.

The spelling of 68166522 in words is "sixty-eight million, one hundred sixty-six thousand, five hundred twenty-two".