166120054 has 4 divisors (see below), whose sum is σ = 249180084. Its totient is φ = 83060026.

The previous prime is 166120027. The next prime is 166120063. The reversal of 166120054 is 450021661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 450021661 = 509 ⋅884129.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41530012 + ... + 41530015.

It is an arithmetic number, because the mean of its divisors is an integer number (62295021).

Almost surely, 2^166120054 is an apocalyptic number.

166120054 is a deficient number, since it is larger than the sum of its proper divisors (83060030).

166120054 is an equidigital number, since it uses as much as digits as its factorization.

166120054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83060029.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 166120054 is about 12888.7568834236. The cubic root of 166120054 is about 549.7189241501.

The spelling of 166120054 in words is "one hundred sixty-six million, one hundred twenty thousand, fifty-four".