670776761 has 12 divisors (see below), whose sum is σ = 703946880. Its totient is φ = 639108360.

The previous prime is 670776739. The next prime is 670776767. The reversal of 670776761 is 167677076.

It is not a de Polignac number, because 670776761 - 2⁶ = 670776697 is a prime.

It is a super-2 number, since 2×670776761² = 899882926195302242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (670776767) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 141020 + ... + 145698.

It is an arithmetic number, because the mean of its divisors is an integer number (58662240).

Almost surely, 2^670776761 is an apocalyptic number.

It is an amenable number.

670776761 is a deficient number, since it is larger than the sum of its proper divisors (33170119).

670776761 is a wasteful number, since it uses less digits than its factorization.

670776761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4996 (or 4973 counting only the distinct ones).

The product of its (nonzero) digits is 518616, while the sum is 47.

The square root of 670776761 is about 25899.3583125142. The cubic root of 670776761 is about 875.3720370582.

The spelling of 670776761 in words is "six hundred seventy million, seven hundred seventy-six thousand, seven hundred sixty-one".