2536722666 has 24 divisors (see below), whose sum is σ = 5550654564. Its totient is φ = 837201600.

The previous prime is 2536722631. The next prime is 2536722667. The reversal of 2536722666 is 6662276352.

It is a happy number.

2536722666 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1569823641 + 966899025 = 39621^2 + 31095^2 .

It is not an unprimeable number, because it can be changed into a prime (2536722667) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 695851 + ... + 699486.

Almost surely, 2^2536722666 is an apocalyptic number.

2536722666 is an abundant number, since it is smaller than the sum of its proper divisors (3013931898).

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

2536722666 is a wasteful number, since it uses less digits than its factorization.

2536722666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1395446 (or 1395443 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 45.

The square root of 2536722666 is about 50365.8879202978. The cubic root of 2536722666 is about 1363.8219098963.

The spelling of 2536722666 in words is "two billion, five hundred thirty-six million, seven hundred twenty-two thousand, six hundred sixty-six".