120166791 has 4 divisors (see below), whose sum is σ = 160222392. Its totient is φ = 80111192.

The previous prime is 120166771. The next prime is 120166793. The reversal of 120166791 is 197661021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 197661021 = 3 ⋅65887007.

It is a cyclic number.

It is not a de Polignac number, because 120166791 - 2¹⁰ = 120165767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120166793) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20027796 + ... + 20027801.

It is an arithmetic number, because the mean of its divisors is an integer number (40055598).

Almost surely, 2^120166791 is an apocalyptic number.

120166791 is a deficient number, since it is larger than the sum of its proper divisors (40055601).

120166791 is an equidigital number, since it uses as much as digits as its factorization.

120166791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40055600.

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 120166791 is about 10962.0614393462. The cubic root of 120166791 is about 493.4708323922.

The spelling of 120166791 in words is "one hundred twenty million, one hundred sixty-six thousand, seven hundred ninety-one".