166122613 has 4 divisors (see below), whose sum is σ = 166957600. Its totient is φ = 165287628.

The previous prime is 166122599. The next prime is 166122659. The reversal of 166122613 is 316221661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166122613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166122673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 417195 + ... + 417592.

It is an arithmetic number, because the mean of its divisors is an integer number (41739400).

Almost surely, 2^166122613 is an apocalyptic number.

It is an amenable number.

166122613 is a deficient number, since it is larger than the sum of its proper divisors (834987).

166122613 is an equidigital number, since it uses as much as digits as its factorization.

166122613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834986.

The product of its digits is 2592, while the sum is 28.

The square root of 166122613 is about 12888.8561556098. The cubic root of 166122613 is about 549.7217468547.

The spelling of 166122613 in words is "one hundred sixty-six million, one hundred twenty-two thousand, six hundred thirteen".