670784677 has 4 divisors (see below), whose sum is σ = 672233920. Its totient is φ = 669335436.

The previous prime is 670784651. The next prime is 670784687. The reversal of 670784677 is 776487076.

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 670784677 - 2²⁷ = 536566949 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 (670784687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 723927 + ... + 724852.

It is an arithmetic number, because the mean of its divisors is an integer number (168058480).

Almost surely, 2^670784677 is an apocalyptic number.

It is an amenable number.

670784677 is a deficient number, since it is larger than the sum of its proper divisors (1449243).

670784677 is a wasteful number, since it uses less digits than its factorization.

670784677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1449242.

The product of its (nonzero) digits is 2765952, while the sum is 52.

The square root of 670784677 is about 25899.5111343824. The cubic root of 670784677 is about 875.3754805376.

The spelling of 670784677 in words is "six hundred seventy million, seven hundred eighty-four thousand, six hundred seventy-seven".