670667407 has 4 divisors (see below), whose sum is σ = 672657856. Its totient is φ = 668676960.

The previous prime is 670667399. The next prime is 670667429. The reversal of 670667407 is 704766076.

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

It is a cyclic number.

It is not a de Polignac number, because 670667407 - 2³ = 670667399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670667467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 994719 + ... + 995392.

It is an arithmetic number, because the mean of its divisors is an integer number (168164464).

Almost surely, 2^670667407 is an apocalyptic number.

670667407 is a deficient number, since it is larger than the sum of its proper divisors (1990449).

670667407 is a wasteful number, since it uses less digits than its factorization.

670667407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1990448.

The product of its (nonzero) digits is 296352, while the sum is 43.

The square root of 670667407 is about 25897.2470930792. The cubic root of 670667407 is about 875.3244650285.

The spelling of 670667407 in words is "six hundred seventy million, six hundred sixty-seven thousand, four hundred seven".