670304765 has 32 divisors (see below), whose sum is σ = 898164960. Its totient is φ = 477010944.

The previous prime is 670304731. The next prime is 670304807. The reversal of 670304765 is 567403076.

It can be written as a sum of positive squares in 16 ways, for example, as 85729081 + 584575684 = 9259^2 + 24178^2 .

It is a cyclic number.

It is not a de Polignac number, because 670304765 - 2¹⁸ = 670042621 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 260867 + ... + 263423.

It is an arithmetic number, because the mean of its divisors is an integer number (28067655).

Almost surely, 2^670304765 is an apocalyptic number.

670304765 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

670304765 is a deficient number, since it is larger than the sum of its proper divisors (227860195).

670304765 is a wasteful number, since it uses less digits than its factorization.

670304765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2721.

The product of its (nonzero) digits is 105840, while the sum is 38.

The square root of 670304765 is about 25890.2445913514. The cubic root of 670304765 is about 875.1666686594.

The spelling of 670304765 in words is "six hundred seventy million, three hundred four thousand, seven hundred sixty-five".