670767817 has 4 divisors (see below), whose sum is σ = 670864896. Its totient is φ = 670670740.

The previous prime is 670767809. The next prime is 670767847. The reversal of 670767817 is 718767076.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 670767817 - 2³ = 670767809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (670767847) 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, 37309 + ... + 52282.

It is an arithmetic number, because the mean of its divisors is an integer number (167716224).

Almost surely, 2^670767817 is an apocalyptic number.

It is an amenable number.

670767817 is a deficient number, since it is larger than the sum of its proper divisors (97079).

670767817 is an equidigital number, since it uses as much as digits as its factorization.

670767817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97078.

The product of its (nonzero) digits is 691488, while the sum is 49.

The square root of 670767817 is about 25899.1856435680. The cubic root of 670767817 is about 875.3681463638.

The spelling of 670767817 in words is "six hundred seventy million, seven hundred sixty-seven thousand, eight hundred seventeen".