121666334590590 has 64 divisors (see below), whose sum is σ = 295283360563200. Its totient is φ = 32079457566464.

The previous prime is 121666334590561. The next prime is 121666334590639. The reversal of 121666334590590 is 95095433666121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 314757379 + ... + 315143681.

It is an arithmetic number, because the mean of its divisors is an integer number (4613802508800).

Almost surely, 2^{121666334590590} is an apocalyptic number.

121666334590590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121666334590590 is an abundant number, since it is smaller than the sum of its proper divisors (173617025972610).

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

121666334590590 is a wasteful number, since it uses less digits than its factorization.

121666334590590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504361.

The product of its (nonzero) digits is 31492800, while the sum is 60.

The spelling of 121666334590590 in words is "one hundred twenty-one trillion, six hundred sixty-six billion, three hundred thirty-four million, five hundred ninety thousand, five hundred ninety".