670017765 has 16 divisors (see below), whose sum is σ = 1072355328. Its totient is φ = 357233856.

The previous prime is 670017757. The next prime is 670017773. The reversal of 670017765 is 567710076.

It is an interprime number because it is at equal distance from previous prime (670017757) and next prime (670017773).

It is not a de Polignac number, because 670017765 - 2³ = 670017757 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78487 + ... + 86603.

It is an arithmetic number, because the mean of its divisors is an integer number (67022208).

Almost surely, 2^670017765 is an apocalyptic number.

It is an amenable number.

670017765 is a deficient number, since it is larger than the sum of its proper divisors (402337563).

670017765 is a wasteful number, since it uses less digits than its factorization.

670017765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13628.

The product of its (nonzero) digits is 61740, while the sum is 39.

The square root of 670017765 is about 25884.7013697280. The cubic root of 670017765 is about 875.0417460355.

The spelling of 670017765 in words is "six hundred seventy million, seventeen thousand, seven hundred sixty-five".