670644236 has 12 divisors (see below), whose sum is σ = 1174254312. Its totient is φ = 335143008.

The previous prime is 670644217. The next prime is 670644239. The reversal of 670644236 is 632446076.

670644236 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 670644236.

It is not an unprimeable number, because it can be changed into a prime (670644239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36170 + ... + 51473.

It is an arithmetic number, because the mean of its divisors is an integer number (97854526).

Almost surely, 2^670644236 is an apocalyptic number.

It is an amenable number.

670644236 is a deficient number, since it is larger than the sum of its proper divisors (503610076).

670644236 is a wasteful number, since it uses less digits than its factorization.

670644236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89560 (or 89558 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 38.

The square root of 670644236 is about 25896.7997250626. The cubic root of 670644236 is about 875.3143843354.

The spelling of 670644236 in words is "six hundred seventy million, six hundred forty-four thousand, two hundred thirty-six".