693491666920 has 32 divisors (see below), whose sum is σ = 1680383655720. Its totient is φ = 256058461440.

The previous prime is 693491666909. The next prime is 693491666921. The reversal of 693491666920 is 29666194396.

It can be written as a sum of positive squares in 4 ways, for example, as 637369109316 + 56122557604 = 798354^2 + 236902^2 .

It is not an unprimeable number, because it can be changed into a prime (693491666921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 666818391 + ... + 666819430.

Almost surely, 2^693491666920 is an apocalyptic number.

It is an amenable number.

693491666920 is an abundant number, since it is smaller than the sum of its proper divisors (986891988800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

693491666920 is a wasteful number, since it uses less digits than its factorization.

693491666920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333637845 (or 1333637841 counting only the distinct ones).

The product of its (nonzero) digits is 22674816, while the sum is 61.

The spelling of 693491666920 in words is "six hundred ninety-three billion, four hundred ninety-one million, six hundred sixty-six thousand, nine hundred twenty".