66361158 has 12 divisors (see below), whose sum is σ = 143782548. Its totient is φ = 22120380.

The previous prime is 66361157. The next prime is 66361177. The reversal of 66361158 is 85116366.

It is a happy number.

66361158 is a `hidden beast` number, since 6 + 636 + 1 + 15 + 8 = 666.

It is a super-2 number, since 2×66361158² = 8807606582201928, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66361153) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1843348 + ... + 1843383.

It is an arithmetic number, because the mean of its divisors is an integer number (11981879).

Almost surely, 2^66361158 is an apocalyptic number.

66361158 is an abundant number, since it is smaller than the sum of its proper divisors (77421390).

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

66361158 is a wasteful number, since it uses less digits than its factorization.

66361158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3686739 (or 3686736 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 66361158 is about 8146.2358178486. The cubic root of 66361158 is about 404.8597960053.

The spelling of 66361158 in words is "sixty-six million, three hundred sixty-one thousand, one hundred fifty-eight".