2665279080 has 160 divisors (see below), whose sum is σ = 8988562440. Its totient is φ = 708341760.

The previous prime is 2665279049. The next prime is 2665279081. The reversal of 2665279080 is 809725662.

It can be written as a sum of positive squares in 4 ways, for example, as 1245948804 + 1419330276 = 35298^2 + 37674^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (2665279081) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 1090660 + ... + 1093100.

Almost surely, 2^2665279080 is an apocalyptic number.

2665279080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2665279080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4494281220).

2665279080 is an abundant number, since it is smaller than the sum of its proper divisors (6323283360).

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

2665279080 is a wasteful number, since it uses less digits than its factorization.

2665279080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2801 (or 2788 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 2665279080 is about 51626.3409511075. The cubic root of 2665279080 is about 1386.4819822557.

The spelling of 2665279080 in words is "two billion, six hundred sixty-five million, two hundred seventy-nine thousand, eighty".