670840407 has 16 divisors (see below), whose sum is σ = 995515360. Its totient is φ = 446472000.

The previous prime is 670840397. The next prime is 670840409. The reversal of 670840407 is 704048076.

It is a happy number.

It is not a de Polignac number, because 670840407 - 2¹⁰ = 670839383 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 (670840409) 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 15 ways as a sum of consecutive naturals, for example, 4444 + ... + 36897.

It is an arithmetic number, because the mean of its divisors is an integer number (62219710).

Almost surely, 2^670840407 is an apocalyptic number.

670840407 is a deficient number, since it is larger than the sum of its proper divisors (324674953).

670840407 is a wasteful number, since it uses less digits than its factorization.

670840407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41951 (or 41945 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 670840407 is about 25900.5870010701. The cubic root of 670840407 is about 875.3997224572.

The spelling of 670840407 in words is "six hundred seventy million, eight hundred forty thousand, four hundred seven".