670808456 has 8 divisors (see below), whose sum is σ = 1257765870. Its totient is φ = 335404224.

The previous prime is 670808431. The next prime is 670808459. The reversal of 670808456 is 654808076.

It can be written as a sum of positive squares in only one way, i.e., 597020356 + 73788100 = 24434^2 + 8590^2 .

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

It is a super-2 number, since 2×670808456² = 899967969282207872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (670808459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41925521 + ... + 41925536.

Almost surely, 2^670808456 is an apocalyptic number.

It is an amenable number.

670808456 is a deficient number, since it is larger than the sum of its proper divisors (586957414).

670808456 is a wasteful number, since it uses less digits than its factorization.

670808456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83851063 (or 83851059 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 44.

The square root of 670808456 is about 25899.9701930330. The cubic root of 670808456 is about 875.3858242978.

The spelling of 670808456 in words is "six hundred seventy million, eight hundred eight thousand, four hundred fifty-six".