166343507 has 16 divisors (see below), whose sum is σ = 188546400. Its totient is φ = 145367040.

The previous prime is 166343501. The next prime is 166343509. The reversal of 166343507 is 705343661.

It is a cyclic number.

It is not a de Polignac number, because 166343507 - 2²² = 162149203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166343501) 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, 80969 + ... + 82997.

It is an arithmetic number, because the mean of its divisors is an integer number (11784150).

Almost surely, 2^166343507 is an apocalyptic number.

166343507 is a deficient number, since it is larger than the sum of its proper divisors (22202893).

166343507 is a wasteful number, since it uses less digits than its factorization.

166343507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2326.

The product of its (nonzero) digits is 45360, while the sum is 35.

The square root of 166343507 is about 12897.4224944366. The cubic root of 166343507 is about 549.9652947798.

The spelling of 166343507 in words is "one hundred sixty-six million, three hundred forty-three thousand, five hundred seven".