66731058 has 24 divisors (see below), whose sum is σ = 145224300. Its totient is φ = 22145184.

The previous prime is 66731051. The next prime is 66731083. The reversal of 66731058 is 85013766.

It can be written as a sum of positive squares in 2 ways, for example, as 62678889 + 4052169 = 7917^2 + 2013^2 .

It is not an unprimeable number, because it can be changed into a prime (66731051) 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, 3973 + ... + 12216.

Almost surely, 2^66731058 is an apocalyptic number.

66731058 is an abundant number, since it is smaller than the sum of its proper divisors (78493242).

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

66731058 is a wasteful number, since it uses less digits than its factorization.

66731058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16426 (or 16423 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 66731058 is about 8168.9080053579. The cubic root of 66731058 is about 405.6106380623.

The spelling of 66731058 in words is "sixty-six million, seven hundred thirty-one thousand, fifty-eight".