264166643 has 8 divisors (see below), whose sum is σ = 292176528. Its totient is φ = 237255264.

The previous prime is 264166613. The next prime is 264166657. The reversal of 264166643 is 346661462.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 264166643 - 2⁸ = 264166387 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 264166597 and 264166606.

It is not an unprimeable number, because it can be changed into a prime (264166613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274121 + ... + 275082.

It is an arithmetic number, because the mean of its divisors is an integer number (36522066).

Almost surely, 2^264166643 is an apocalyptic number.

264166643 is a deficient number, since it is larger than the sum of its proper divisors (28009885).

264166643 is a wasteful number, since it uses less digits than its factorization.

264166643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549253.

The product of its digits is 124416, while the sum is 38.

The square root of 264166643 is about 16253.2040841183. The cubic root of 264166643 is about 641.6418156752.

Subtracting from 264166643 its sum of digits (38), we obtain a triangular number (264166605 = T₂₂₉₈₅).

The spelling of 264166643 in words is "two hundred sixty-four million, one hundred sixty-six thousand, six hundred forty-three".