116660640421 has 32 divisors (see below), whose sum is σ = 133799027040. Its totient is φ = 100763959296.

The previous prime is 116660640409. The next prime is 116660640443. The reversal of 116660640421 is 124046066611.

It can be written as a sum of positive squares in 16 ways, for example, as 24177140100 + 92483500321 = 155490^2 + 304111^2 .

It is not a de Polignac number, because 116660640421 - 2⁵ = 116660640389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116660640451) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35042085 + ... + 35045413.

It is an arithmetic number, because the mean of its divisors is an integer number (4181219595).

Almost surely, 2^116660640421 is an apocalyptic number.

It is an amenable number.

116660640421 is a deficient number, since it is larger than the sum of its proper divisors (17138386619).

116660640421 is a wasteful number, since it uses less digits than its factorization.

116660640421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4233.

The product of its (nonzero) digits is 41472, while the sum is 37.

The spelling of 116660640421 in words is "one hundred sixteen billion, six hundred sixty million, six hundred forty thousand, four hundred twenty-one".