166072277 has 8 divisors (see below), whose sum is σ = 189875136. Its totient is φ = 142288992.

The previous prime is 166072273. The next prime is 166072307. The reversal of 166072277 is 772270661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166072277 - 2² = 166072273 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 166072277.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166072273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28538 + ... + 33860.

It is an arithmetic number, because the mean of its divisors is an integer number (23734392).

Almost surely, 2^166072277 is an apocalyptic number.

It is an amenable number.

166072277 is a deficient number, since it is larger than the sum of its proper divisors (23802859).

166072277 is an equidigital number, since it uses as much as digits as its factorization.

166072277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9787.

The product of its (nonzero) digits is 49392, while the sum is 38.

The square root of 166072277 is about 12886.9033130539. The cubic root of 166072277 is about 549.6662184137. Note that the first 3 decimals are identical.

It can be divided in two parts, 1660 and 72277, that added together give a palindrome (73937).

The spelling of 166072277 in words is "one hundred sixty-six million, seventy-two thousand, two hundred seventy-seven".