2667561764 has 24 divisors (see below), whose sum is σ = 5444006400. Its totient is φ = 1143240168.

The previous prime is 2667561737. The next prime is 2667561773. The reversal of 2667561764 is 4671657662.

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 7 ways as a sum of consecutive naturals, for example, 970772 + ... + 973515.

It is an arithmetic number, because the mean of its divisors is an integer number (226833600).

Almost surely, 2^2667561764 is an apocalyptic number.

It is an amenable number.

2667561764 is an abundant number, since it is smaller than the sum of its proper divisors (2776444636).

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

2667561764 is a wasteful number, since it uses less digits than its factorization.

2667561764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1944312 (or 1944296 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 50.

The square root of 2667561764 is about 51648.4439649444. The cubic root of 2667561764 is about 1386.8776878014.

The spelling of 2667561764 in words is "two billion, six hundred sixty-seven million, five hundred sixty-one thousand, seven hundred sixty-four".