670621172 has 48 divisors (see below), whose sum is σ = 1311886800. Its totient is φ = 297830400.

The previous prime is 670621139. The next prime is 670621177. The reversal of 670621172 is 271126076.

It can be written as a sum of positive squares in 8 ways, for example, as 19044496 + 651576676 = 4364^2 + 25526^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670621177) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 604154 + ... + 605262.

It is an arithmetic number, because the mean of its divisors is an integer number (27330975).

Almost surely, 2^670621172 is an apocalyptic number.

It is an amenable number.

670621172 is a deficient number, since it is larger than the sum of its proper divisors (641265628).

670621172 is a wasteful number, since it uses less digits than its factorization.

670621172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1556 (or 1554 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 670621172 is about 25896.3544152454. The cubic root of 670621172 is about 875.3043499629.

The spelling of 670621172 in words is "six hundred seventy million, six hundred twenty-one thousand, one hundred seventy-two".