670556885 has 4 divisors (see below), whose sum is σ = 804668268. Its totient is φ = 536445504.

The previous prime is 670556867. The next prime is 670556899. The reversal of 670556885 is 588655076.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 337603876 + 332953009 = 18374^2 + 18247^2 .

It is a cyclic number.

It is not a de Polignac number, because 670556885 - 2¹⁴ = 670540501 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67055684 + ... + 67055693.

It is an arithmetic number, because the mean of its divisors is an integer number (201167067).

Almost surely, 2^670556885 is an apocalyptic number.

It is an amenable number.

670556885 is a deficient number, since it is larger than the sum of its proper divisors (134111383).

670556885 is a wasteful number, since it uses less digits than its factorization.

670556885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134111382.

The product of its (nonzero) digits is 2016000, while the sum is 50.

The square root of 670556885 is about 25895.1131490094. The cubic root of 670556885 is about 875.2763796316.

The spelling of 670556885 in words is "six hundred seventy million, five hundred fifty-six thousand, eight hundred eighty-five".