672557634 has 48 divisors (see below), whose sum is σ = 1738591200. Its totient is φ = 192158568.

The previous prime is 672557533. The next prime is 672557659. The reversal of 672557634 is 436755276.

672557634 is a `hidden beast` number, since 6 + 7 + 2 + 5 + 5 + 7 + 634 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 672557634.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 124444 + ... + 129735.

It is an arithmetic number, because the mean of its divisors is an integer number (36220650).

Almost surely, 2^672557634 is an apocalyptic number.

672557634 is an abundant number, since it is smaller than the sum of its proper divisors (1066033566).

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

672557634 is a wasteful number, since it uses less digits than its factorization.

672557634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254204 (or 254191 counting only the distinct ones).

The product of its digits is 1058400, while the sum is 45.

The square root of 672557634 is about 25933.7161625556. The cubic root of 672557634 is about 876.1460396416.

The spelling of 672557634 in words is "six hundred seventy-two million, five hundred fifty-seven thousand, six hundred thirty-four".