670788067 has 4 divisors (see below), whose sum is σ = 693918720. Its totient is φ = 647657416.

The previous prime is 670788061. The next prime is 670788113. The reversal of 670788067 is 760887076.

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-670788067 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 670788067.

It is not an unprimeable number, because it can be changed into a prime (670788061) 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, 11565283 + ... + 11565340.

It is an arithmetic number, because the mean of its divisors is an integer number (173479680).

Almost surely, 2^670788067 is an apocalyptic number.

670788067 is a deficient number, since it is larger than the sum of its proper divisors (23130653).

670788067 is a wasteful number, since it uses less digits than its factorization.

670788067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23130652.

The product of its (nonzero) digits is 790272, while the sum is 49.

The square root of 670788067 is about 25899.5765795505. The cubic root of 670788067 is about 875.3769551876.

Subtracting 670788067 from its reverse (760887076), we obtain a palindrome (90099009).

The spelling of 670788067 in words is "six hundred seventy million, seven hundred eighty-eight thousand, sixty-seven".