670666835 has 8 divisors (see below), whose sum is σ = 807389856. Its totient is φ = 534807040.

The previous prime is 670666831. The next prime is 670666849. The reversal of 670666835 is 538666076.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 670666835 - 2² = 670666831 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 670666835.

It is not an unprimeable number, because it can be changed into a prime (670666831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214094 + ... + 217203.

It is an arithmetic number, because the mean of its divisors is an integer number (100923732).

Almost surely, 2^670666835 is an apocalyptic number.

670666835 is a deficient number, since it is larger than the sum of its proper divisors (136723021).

670666835 is a wasteful number, since it uses less digits than its factorization.

670666835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431613.

The product of its (nonzero) digits is 1088640, while the sum is 47.

The square root of 670666835 is about 25897.2360494320. The cubic root of 670666835 is about 875.3242161790.

The spelling of 670666835 in words is "six hundred seventy million, six hundred sixty-six thousand, eight hundred thirty-five".