166265415 has 12 divisors (see below), whose sum is σ = 288193464. Its totient is φ = 88674864.

The previous prime is 166265377. The next prime is 166265419. The reversal of 166265415 is 514562661.

166265415 is a `hidden beast` number, since 16 + 626 + 5 + 4 + 15 = 666.

It is not a de Polignac number, because 166265415 - 2¹⁰ = 166264391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166265415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166265419) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1847349 + ... + 1847438.

It is an arithmetic number, because the mean of its divisors is an integer number (24016122).

Almost surely, 2^166265415 is an apocalyptic number.

166265415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

166265415 is a deficient number, since it is larger than the sum of its proper divisors (121928049).

166265415 is a wasteful number, since it uses less digits than its factorization.

166265415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3694798 (or 3694795 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 166265415 is about 12894.3947124322. The cubic root of 166265415 is about 549.8792186571.

The spelling of 166265415 in words is "one hundred sixty-six million, two hundred sixty-five thousand, four hundred fifteen".