672491658 has 16 divisors (see below), whose sum is σ = 1347206400. Its totient is φ = 223793376.

The previous prime is 672491657. The next prime is 672491669. The reversal of 672491658 is 856194276.

It is not an unprimeable number, because it can be changed into a prime (672491653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88683 + ... + 95966.

It is an arithmetic number, because the mean of its divisors is an integer number (84200400).

Almost surely, 2^672491658 is an apocalyptic number.

672491658 is an abundant number, since it is smaller than the sum of its proper divisors (674714742).

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

672491658 is a wasteful number, since it uses less digits than its factorization.

672491658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185261.

The product of its digits is 725760, while the sum is 48.

The square root of 672491658 is about 25932.4441192881. Note that the first 3 decimals coincide. The cubic root of 672491658 is about 876.1173895560.

The spelling of 672491658 in words is "six hundred seventy-two million, four hundred ninety-one thousand, six hundred fifty-eight".