166015497 has 4 divisors (see below), whose sum is σ = 221354000. Its totient is φ = 110676996.

The previous prime is 166015477. The next prime is 166015583. The reversal of 166015497 is 794510661.

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 not a de Polignac number, because 166015497 - 2¹⁶ = 165949961 is a prime.

It is a super-2 number, since 2×166015497² = 55122290488314018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166015427) 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, 27669247 + ... + 27669252.

It is an arithmetic number, because the mean of its divisors is an integer number (55338500).

Almost surely, 2^166015497 is an apocalyptic number.

It is an amenable number.

166015497 is a deficient number, since it is larger than the sum of its proper divisors (55338503).

166015497 is an equidigital number, since it uses as much as digits as its factorization.

166015497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55338502.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 166015497 is about 12884.7001129246. The cubic root of 166015497 is about 549.6035677694.

The spelling of 166015497 in words is "one hundred sixty-six million, fifteen thousand, four hundred ninety-seven".