670866263 has 16 divisors (see below), whose sum is σ = 695001120. Its totient is φ = 647184384.

The previous prime is 670866253. The next prime is 670866281. The reversal of 670866263 is 362668076.

It is a cyclic number.

It is not a de Polignac number, because 670866263 - 2⁶ = 670866199 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670866253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1900295 + ... + 1900647.

It is an arithmetic number, because the mean of its divisors is an integer number (43437570).

Almost surely, 2^670866263 is an apocalyptic number.

670866263 is a deficient number, since it is larger than the sum of its proper divisors (24134857).

670866263 is a wasteful number, since it uses less digits than its factorization.

670866263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818.

The product of its (nonzero) digits is 435456, while the sum is 44.

The square root of 670866263 is about 25901.0861355272. The cubic root of 670866263 is about 875.4109690687.

The spelling of 670866263 in words is "six hundred seventy million, eight hundred sixty-six thousand, two hundred sixty-three".