166310985 has 16 divisors (see below), whose sum is σ = 266955264. Its totient is φ = 88413312.

The previous prime is 166310981. The next prime is 166311023. The reversal of 166310985 is 589013661.

166310985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 166310985 - 2² = 166310981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166310981) 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, 13017 + ... + 22406.

It is an arithmetic number, because the mean of its divisors is an integer number (16684704).

Almost surely, 2^166310985 is an apocalyptic number.

166310985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166310985 is a deficient number, since it is larger than the sum of its proper divisors (100644279).

166310985 is a wasteful number, since it uses less digits than its factorization.

166310985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35744.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 166310985 is about 12896.1616382550. The cubic root of 166310985 is about 549.9294510061.

The spelling of 166310985 in words is "one hundred sixty-six million, three hundred ten thousand, nine hundred eighty-five".