670857165 has 24 divisors (see below), whose sum is σ = 1268530848. Its totient is φ = 325263840.

The previous prime is 670857127. The next prime is 670857181. The reversal of 670857165 is 561758076.

670857165 is a `hidden beast` number, since 6 + 70 + 8 + 571 + 6 + 5 = 666.

It is not a de Polignac number, because 670857165 - 2⁷ = 670857037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 670857165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 677139 + ... + 678128.

It is an arithmetic number, because the mean of its divisors is an integer number (52855452).

Almost surely, 2^670857165 is an apocalyptic number.

It is an amenable number.

670857165 is a deficient number, since it is larger than the sum of its proper divisors (597673683).

670857165 is a wasteful number, since it uses less digits than its factorization.

670857165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1355289 (or 1355286 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 45.

The square root of 670857165 is about 25900.9105052313. The cubic root of 670857165 is about 875.4070117350.

The spelling of 670857165 in words is "six hundred seventy million, eight hundred fifty-seven thousand, one hundred sixty-five".