66958158 has 16 divisors (see below), whose sum is σ = 138534480. Its totient is φ = 21549696.

The previous prime is 66958141. The next prime is 66958163. The reversal of 66958158 is 85185966.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192235 + ... + 192582.

It is an arithmetic number, because the mean of its divisors is an integer number (8658405).

Almost surely, 2^66958158 is an apocalyptic number.

66958158 is an abundant number, since it is smaller than the sum of its proper divisors (71576322).

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

66958158 is a wasteful number, since it uses less digits than its factorization.

66958158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384851.

The product of its digits is 518400, while the sum is 48.

The square root of 66958158 is about 8182.7964657567. The cubic root of 66958158 is about 406.0702435347.

The spelling of 66958158 in words is "sixty-six million, nine hundred fifty-eight thousand, one hundred fifty-eight".