670865855 has 16 divisors (see below), whose sum is σ = 878732928. Its totient is φ = 487620000.

The previous prime is 670865837. The next prime is 670865873. The reversal of 670865855 is 558568076.

It is an interprime number because it is at equal distance from previous prime (670865837) and next prime (670865873).

It is a de Polignac number, because none of the positive numbers 2^k-670865855 is a prime.

It is a super-3 number, since 3×670865855³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163580 + ... + 167630.

It is an arithmetic number, because the mean of its divisors is an integer number (54920808).

Almost surely, 2^670865855 is an apocalyptic number.

670865855 is a deficient number, since it is larger than the sum of its proper divisors (207867073).

670865855 is a wasteful number, since it uses less digits than its factorization.

670865855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7078.

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

The square root of 670865855 is about 25901.0782594084. The cubic root of 670865855 is about 875.4107916028.

The spelling of 670865855 in words is "six hundred seventy million, eight hundred sixty-five thousand, eight hundred fifty-five".