670765056 has 312 divisors, whose sum is σ = 2158492320. Its totient is φ = 184025088.

The previous prime is 670765013. The next prime is 670765057. The reversal of 670765056 is 650567076.

It is a tau number, because it is divible by the number of its divisors (312).

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 670764999 and 670765017.

It is not an unprimeable number, because it can be changed into a prime (670765057) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35303415 + ... + 35303433.

Almost surely, 2^670765056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 670765056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1079246160).

670765056 is an abundant number, since it is smaller than the sum of its proper divisors (1487727264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

670765056 is a wasteful number, since it uses less digits than its factorization.

670765056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89 (or 54 counting only the distinct ones).

The product of its (nonzero) digits is 264600, while the sum is 42.

The square root of 670765056 is about 25899.1323406789. The cubic root of 670765056 is about 875.3669453050.

The spelling of 670765056 in words is "six hundred seventy million, seven hundred sixty-five thousand, fifty-six".