660806343 has 10 divisors (see below), whose sum is σ = 987130584. Its totient is φ = 440537508.

The previous prime is 660806317. The next prime is 660806357. The reversal of 660806343 is 343608066.

660806343 is a `hidden beast` number, since 6 + 608 + 0 + 6 + 3 + 43 = 666.

It is not a de Polignac number, because 660806343 - 2⁸ = 660806087 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 660806298 and 660806307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660806743) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4078971 + ... + 4079132.

Almost surely, 2^660806343 is an apocalyptic number.

660806343 is a deficient number, since it is larger than the sum of its proper divisors (326324241).

660806343 is an equidigital number, since it uses as much as digits as its factorization.

660806343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8158115 (or 8158106 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 660806343 is about 25706.1537963189. The cubic root of 660806343 is about 871.0131953256.

The spelling of 660806343 in words is "six hundred sixty million, eight hundred six thousand, three hundred forty-three".