672691635 has 240 divisors, whose sum is σ = 1585096128. Its totient is φ = 266872320.

The previous prime is 672691619. The next prime is 672691693. The reversal of 672691635 is 536196276.

672691635 is a `hidden beast` number, since 6 + 7 + 2 + 6 + 9 + 1 + 635 = 666.

It is not a de Polignac number, because 672691635 - 2⁴ = 672691619 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 12692269 + ... + 12692321.

Almost surely, 2^672691635 is an apocalyptic number.

672691635 is an abundant number, since it is smaller than the sum of its proper divisors (912404493).

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

672691635 is a wasteful number, since it uses less digits than its factorization.

672691635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136 (or 116 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The square root of 672691635 is about 25936.2995625822. The cubic root of 672691635 is about 876.2042238244.

The spelling of 672691635 in words is "six hundred seventy-two million, six hundred ninety-one thousand, six hundred thirty-five".