660834731 has 2 divisors, whose sum is σ = 660834732. Its totient is φ = 660834730.

The previous prime is 660834703. The next prime is 660834749. The reversal of 660834731 is 137438066.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 660834731 - 2⁶ = 660834667 is a prime.

It is a super-2 number, since 2×660834731² = 873405083391684722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (660834791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330417365 + 330417366.

It is an arithmetic number, because the mean of its divisors is an integer number (330417366).

Almost surely, 2^660834731 is an apocalyptic number.

660834731 is a deficient number, since it is larger than the sum of its proper divisors (1).

660834731 is an equidigital number, since it uses as much as digits as its factorization.

660834731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 660834731 is about 25706.7059538946. The cubic root of 660834731 is about 871.0256679503.

The spelling of 660834731 in words is "six hundred sixty million, eight hundred thirty-four thousand, seven hundred thirty-one".