665262772 has 12 divisors (see below), whose sum is σ = 1164467556. Its totient is φ = 332557760.

The previous prime is 665262739. The next prime is 665262779. The reversal of 665262772 is 277262566.

It can be written as a sum of positive squares in 2 ways, for example, as 113294736 + 551968036 = 10644^2 + 23494^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665262779) 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, 5322 + ... + 36862.

It is an arithmetic number, because the mean of its divisors is an integer number (97038963).

Almost surely, 2^665262772 is an apocalyptic number.

It is an amenable number.

665262772 is a deficient number, since it is larger than the sum of its proper divisors (499204784).

665262772 is a wasteful number, since it uses less digits than its factorization.

665262772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36818 (or 36816 counting only the distinct ones).

The product of its digits is 423360, while the sum is 43.

The square root of 665262772 is about 25792.6883437923. The cubic root of 665262772 is about 872.9668263150.

The spelling of 665262772 in words is "six hundred sixty-five million, two hundred sixty-two thousand, seven hundred seventy-two".