166266465 has 16 divisors (see below), whose sum is σ = 266258688. Its totient is φ = 88598016.

The previous prime is 166266449. The next prime is 166266467. The reversal of 166266465 is 564662661.

It is a happy number.

It is not a de Polignac number, because 166266465 - 2⁴ = 166266449 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (166266467) 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, 15729 + ... + 24081.

It is an arithmetic number, because the mean of its divisors is an integer number (16641168).

Almost surely, 2^166266465 is an apocalyptic number.

166266465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166266465 is a deficient number, since it is larger than the sum of its proper divisors (99992223).

166266465 is a wasteful number, since it uses less digits than its factorization.

166266465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9688.

The product of its digits is 311040, while the sum is 42.

The square root of 166266465 is about 12894.4354277339. The cubic root of 166266465 is about 549.8803761878.

The spelling of 166266465 in words is "one hundred sixty-six million, two hundred sixty-six thousand, four hundred sixty-five".