670343881 has 9 divisors (see below), whose sum is σ = 712563271. Its totient is φ = 630497632.

The previous prime is 670343851. The next prime is 670343897. The reversal of 670343881 is 188343076.

The square root of 670343881 is 25891.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 521894025 + 148449856 = 22845^2 + 12184^2 .

It is not a de Polignac number, because 670343881 - 2⁷ = 670343753 is a prime.

It is a super-2 number, since 2×670343881² = 898721837588284322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (670343801) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 439386 + ... + 440908.

Almost surely, 2^670343881 is an apocalyptic number.

670343881 is the 25891-st square number.

670343881 is the 12946-th centered octagonal number.

It is an amenable number.

670343881 is a deficient number, since it is larger than the sum of its proper divisors (42219390).

670343881 is an frugal number, since it uses more digits than its factorization.

670343881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3080 (or 1540 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 40.

The cubic root of 670343881 is about 875.1836919376.

The spelling of 670343881 in words is "six hundred seventy million, three hundred forty-three thousand, eight hundred eighty-one".