330685681 has 4 divisors (see below), whose sum is σ = 330858864. Its totient is φ = 330512500.

The previous prime is 330685679. The next prime is 330685699. The reversal of 330685681 is 186586033.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 330685681 - 2¹ = 330685679 is a prime.

It is a super-2 number, since 2×330685681² = 218706039236867522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (330685601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83695 + ... + 87556.

It is an arithmetic number, because the mean of its divisors is an integer number (82714716).

Almost surely, 2^330685681 is an apocalyptic number.

It is an amenable number.

330685681 is a deficient number, since it is larger than the sum of its proper divisors (173183).

330685681 is a wasteful number, since it uses less digits than its factorization.

330685681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173182.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 330685681 is about 18184.7650795934. The cubic root of 330685681 is about 691.5206126862.

The spelling of 330685681 in words is "three hundred thirty million, six hundred eighty-five thousand, six hundred eighty-one".