670305656 has 8 divisors (see below), whose sum is σ = 1256823120. Its totient is φ = 335152824.

The previous prime is 670305611. The next prime is 670305659. The reversal of 670305656 is 656503076.

It is a tau number, because it is divible by the number of its divisors (8).

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670305659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41894096 + ... + 41894111.

It is an arithmetic number, because the mean of its divisors is an integer number (157102890).

Almost surely, 2^670305656 is an apocalyptic number.

It is an amenable number.

670305656 is a deficient number, since it is larger than the sum of its proper divisors (586517464).

670305656 is a wasteful number, since it uses less digits than its factorization.

670305656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83788213 (or 83788209 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 38.

The square root of 670305656 is about 25890.2617985991. The cubic root of 670305656 is about 875.1670564298.

The spelling of 670305656 in words is "six hundred seventy million, three hundred five thousand, six hundred fifty-six".