670400667 has 12 divisors (see below), whose sum is σ = 969638904. Its totient is φ = 446341920.

The previous prime is 670400639. The next prime is 670400677. The reversal of 670400667 is 766004076.

It is not a de Polignac number, because 670400667 - 2⁶ = 670400603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (670400677) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42093 + ... + 55790.

It is an arithmetic number, because the mean of its divisors is an integer number (80803242).

Almost surely, 2^670400667 is an apocalyptic number.

670400667 is a deficient number, since it is larger than the sum of its proper divisors (299238237).

670400667 is a wasteful number, since it uses less digits than its factorization.

670400667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98650 (or 98647 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 670400667 is about 25892.0966126731. The cubic root of 670400667 is about 875.2084040191.

The spelling of 670400667 in words is "six hundred seventy million, four hundred thousand, six hundred sixty-seven".