670400666 has 8 divisors (see below), whose sum is σ = 1082954964. Its totient is φ = 309415680.

The previous prime is 670400639. The next prime is 670400677. The reversal of 670400666 is 666004076.

670400666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 669308641 + 1092025 = 25871^2 + 1045^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12892295 + ... + 12892346.

Almost surely, 2^670400666 is an apocalyptic number.

670400666 is a deficient number, since it is larger than the sum of its proper divisors (412554298).

670400666 is a wasteful number, since it uses less digits than its factorization.

670400666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25784656.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 670400666 is about 25892.0965933622. The cubic root of 670400666 is about 875.2084035839.

The spelling of 670400666 in words is "six hundred seventy million, four hundred thousand, six hundred sixty-six".