166260365 has 4 divisors (see below), whose sum is σ = 199512444. Its totient is φ = 133008288.

The previous prime is 166260361. The next prime is 166260377. The reversal of 166260365 is 563062661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16760836 + 149499529 = 4094^2 + 12227^2 .

It is a cyclic number.

It is not a de Polignac number, because 166260365 - 2² = 166260361 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 (166260361) 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, 16626032 + ... + 16626041.

It is an arithmetic number, because the mean of its divisors is an integer number (49878111).

Almost surely, 2^166260365 is an apocalyptic number.

It is an amenable number.

166260365 is a deficient number, since it is larger than the sum of its proper divisors (33252079).

166260365 is an equidigital number, since it uses as much as digits as its factorization.

166260365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33252078.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 166260365 is about 12894.1988894231. The cubic root of 166260365 is about 549.8736514176.

The spelling of 166260365 in words is "one hundred sixty-six million, two hundred sixty thousand, three hundred sixty-five".