670778390 has 16 divisors (see below), whose sum is σ = 1209578832. Its totient is φ = 267827424.

The previous prime is 670778369. The next prime is 670778411. The reversal of 670778390 is 93877076.

It is an interprime number because it is at equal distance from previous prime (670778369) and next prime (670778411).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54644 + ... + 65783.

It is an arithmetic number, because the mean of its divisors is an integer number (75598677).

Almost surely, 2^670778390 is an apocalyptic number.

670778390 is a deficient number, since it is larger than the sum of its proper divisors (538800442).

670778390 is a wasteful number, since it uses less digits than its factorization.

670778390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120991.

The product of its (nonzero) digits is 444528, while the sum is 47.

The square root of 670778390 is about 25899.3897611507. The cubic root of 670778390 is about 875.3727456794.

The spelling of 670778390 in words is "six hundred seventy million, seven hundred seventy-eight thousand, three hundred ninety".