670138684 has 6 divisors (see below), whose sum is σ = 1172742704. Its totient is φ = 335069340.

The previous prime is 670138681. The next prime is 670138739. The reversal of 670138684 is 486831076.

670138684 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 670138684.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670138681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83767332 + ... + 83767339.

Almost surely, 2^670138684 is an apocalyptic number.

It is an amenable number.

670138684 is a deficient number, since it is larger than the sum of its proper divisors (502604020).

670138684 is a wasteful number, since it uses less digits than its factorization.

670138684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167534675 (or 167534673 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 670138684 is about 25887.0369876508. The cubic root of 670138684 is about 875.0943828529.

The spelling of 670138684 in words is "six hundred seventy million, one hundred thirty-eight thousand, six hundred eighty-four".