264440665 has 8 divisors (see below), whose sum is σ = 325905480. Its totient is φ = 205834752.

The previous prime is 264440663. The next prime is 264440711. The reversal of 264440665 is 566044462.

It can be written as a sum of positive squares in 4 ways, for example, as 52359696 + 212080969 = 7236^2 + 14563^2 .

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 264440665 - 2¹ = 264440663 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (264440663) 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, 714520 + ... + 714889.

It is an arithmetic number, because the mean of its divisors is an integer number (40738185).

Almost surely, 2^264440665 is an apocalyptic number.

It is an amenable number.

264440665 is a deficient number, since it is larger than the sum of its proper divisors (61464815).

264440665 is a wasteful number, since it uses less digits than its factorization.

264440665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1429451.

The product of its (nonzero) digits is 138240, while the sum is 37.

The square root of 264440665 is about 16261.6316831983. The cubic root of 264440665 is about 641.8635989305.

The spelling of 264440665 in words is "two hundred sixty-four million, four hundred forty thousand, six hundred sixty-five".