2664569780 has 48 divisors (see below), whose sum is σ = 5871325824. Its totient is φ = 1013823360.

The previous prime is 2664569771. The next prime is 2664569797. The reversal of 2664569780 is 879654662.

It is a super-2 number, since 2×2664569780² = 14199864224978496800, which contains 22 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 (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67259 + ... + 99261.

It is an arithmetic number, because the mean of its divisors is an integer number (122319288).

Almost surely, 2^2664569780 is an apocalyptic number.

2664569780 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 2664569780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2935662912).

2664569780 is an abundant number, since it is smaller than the sum of its proper divisors (3206756044).

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

2664569780 is a wasteful number, since it uses less digits than its factorization.

2664569780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32216 (or 32214 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 53.

The square root of 2664569780 is about 51619.4709387843. The cubic root of 2664569780 is about 1386.3589783861.

The spelling of 2664569780 in words is "two billion, six hundred sixty-four million, five hundred sixty-nine thousand, seven hundred eighty".