670776664 has 32 divisors (see below), whose sum is σ = 1298174400. Its totient is φ = 324767520.

The previous prime is 670776649. The next prime is 670776697. The reversal of 670776664 is 466677076.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21019 + ... + 42229.

It is an arithmetic number, because the mean of its divisors is an integer number (40567950).

Almost surely, 2^670776664 is an apocalyptic number.

It is an amenable number.

670776664 is a deficient number, since it is larger than the sum of its proper divisors (627397736).

670776664 is a wasteful number, since it uses less digits than its factorization.

670776664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21343 (or 21339 counting only the distinct ones).

The product of its (nonzero) digits is 1778112, while the sum is 49.

The square root of 670776664 is about 25899.3564398809. The cubic root of 670776664 is about 875.3719948628.

The spelling of 670776664 in words is "six hundred seventy million, seven hundred seventy-six thousand, six hundred sixty-four".