670650667 has 4 divisors (see below), whose sum is σ = 671842440. Its totient is φ = 669458896.

The previous prime is 670650647. The next prime is 670650679. The reversal of 670650667 is 766056076.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-670650667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (670650647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 595042 + ... + 596167.

It is an arithmetic number, because the mean of its divisors is an integer number (167960610).

Almost surely, 2^670650667 is an apocalyptic number.

670650667 is a deficient number, since it is larger than the sum of its proper divisors (1191773).

670650667 is a wasteful number, since it uses less digits than its factorization.

670650667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1191772.

The product of its (nonzero) digits is 317520, while the sum is 43.

The square root of 670650667 is about 25896.9238906863. The cubic root of 670650667 is about 875.3171822068.

The spelling of 670650667 in words is "six hundred seventy million, six hundred fifty thousand, six hundred sixty-seven".