120666623 has 16 divisors (see below), whose sum is σ = 152997120. Its totient is φ = 92428800.

The previous prime is 120666577. The next prime is 120666641. The reversal of 120666623 is 326666021.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120666623 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 120666623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120666223) 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, 8738 + ... + 17823.

It is an arithmetic number, because the mean of its divisors is an integer number (9562320).

Almost surely, 2^120666623 is an apocalyptic number.

120666623 is a deficient number, since it is larger than the sum of its proper divisors (32330497).

120666623 is a wasteful number, since it uses less digits than its factorization.

120666623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26638.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 120666623 is about 10984.8360479344. The cubic root of 120666623 is about 494.1540808355.

The spelling of 120666623 in words is "one hundred twenty million, six hundred sixty-six thousand, six hundred twenty-three".