2665298772 has 18 divisors (see below), whose sum is σ = 6737283098. Its totient is φ = 888432912.

The previous prime is 2665298747. The next prime is 2665298809. The reversal of 2665298772 is 2778925662.

It can be written as a sum of positive squares in only one way, i.e., 1642194576 + 1023104196 = 40524^2 + 31986^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-3 number, since 3×2665298772³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37018003 + ... + 37018074.

Almost surely, 2^2665298772 is an apocalyptic number.

It is an amenable number.

2665298772 is an abundant number, since it is smaller than the sum of its proper divisors (4071984326).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2665298772 is a wasteful number, since it uses less digits than its factorization.

2665298772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74036087 (or 74036082 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 54.

The square root of 2665298772 is about 51626.5316673510. The cubic root of 2665298772 is about 1386.4853968495.

The spelling of 2665298772 in words is "two billion, six hundred sixty-five million, two hundred ninety-eight thousand, seven hundred seventy-two".