670756 has 12 divisors (see below), whose sum is σ = 1193500. Its totient is φ = 329760.

The previous prime is 670739. The next prime is 670763. The reversal of 670756 is 657076.

It can be written as a sum of positive squares in 2 ways, for example, as 46656 + 624100 = 216^2 + 790^2 .

It is a super-2 number, since 2×670756² = 899827223072, which contains 22 as substring.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

670756 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1131 + ... + 1618.

2⁶⁷⁰⁷⁵⁶ is an apocalyptic number.

It is an amenable number.

670756 is a deficient number, since it is larger than the sum of its proper divisors (522744).

670756 is a wasteful number, since it uses less digits than its factorization.

670756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2814 (or 2812 counting only the distinct ones).

The product of its (nonzero) digits is 8820, while the sum is 31.

The square root of 670756 is about 818.9969474913. The cubic root of 670756 is about 87.5363005844.

It can be divided in two parts, 67075 and 6, that added together give a square (67081 = 259²).

The spelling of 670756 in words is "six hundred seventy thousand, seven hundred fifty-six".