331693663 has 16 divisors (see below), whose sum is σ = 387265536. Its totient is φ = 278197920.

The previous prime is 331693657. The next prime is 331693667. The reversal of 331693663 is 366396133.

It is a happy number.

It is not a de Polignac number, because 331693663 - 2⁵ = 331693631 is a prime.

It is a super-2 number, since 2×331693663² = 220041372148715138, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331693667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170808 + ... + 172738.

It is an arithmetic number, because the mean of its divisors is an integer number (24204096).

Almost surely, 2^331693663 is an apocalyptic number.

331693663 is a deficient number, since it is larger than the sum of its proper divisors (55571873).

331693663 is a wasteful number, since it uses less digits than its factorization.

331693663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2454.

The product of its digits is 157464, while the sum is 40.

The square root of 331693663 is about 18212.4590047583. The cubic root of 331693663 is about 692.2225212130. Note that the first 3 decimals are identical.

The spelling of 331693663 in words is "three hundred thirty-one million, six hundred ninety-three thousand, six hundred sixty-three".