264299661 has 12 divisors (see below), whose sum is σ = 383687200. Its totient is φ = 175313160.

The previous prime is 264299597. The next prime is 264299681. The reversal of 264299661 is 166992462.

264299661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 264299661 - 2⁶ = 264299597 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 (264299681) 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, 71995 + ... + 75576.

Almost surely, 2^264299661 is an apocalyptic number.

It is an amenable number.

264299661 is a deficient number, since it is larger than the sum of its proper divisors (119387539).

264299661 is a wasteful number, since it uses less digits than its factorization.

264299661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147776 (or 147773 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 264299661 is about 16257.2956238115. The cubic root of 264299661 is about 641.7494946620.

It can be divided in two parts, 264 and 299661, that added together give a triangular number (299925 = T₇₇₄).

The spelling of 264299661 in words is "two hundred sixty-four million, two hundred ninety-nine thousand, six hundred sixty-one".