166121270 has 24 divisors (see below), whose sum is σ = 347838624. Its totient is φ = 56955696.

The previous prime is 166121261. The next prime is 166121321. The reversal of 166121270 is 72121661.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 169022 + ... + 170001.

It is an arithmetic number, because the mean of its divisors is an integer number (14493276).

Almost surely, 2^166121270 is an apocalyptic number.

166121270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166121270 is an abundant number, since it is smaller than the sum of its proper divisors (181717354).

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

166121270 is a wasteful number, since it uses less digits than its factorization.

166121270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339044 (or 339037 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 166121270 is about 12888.8040562342. The cubic root of 166121270 is about 549.7202654623.

The spelling of 166121270 in words is "one hundred sixty-six million, one hundred twenty-one thousand, two hundred seventy".