2640622366 has 4 divisors (see below), whose sum is σ = 3960933552. Its totient is φ = 1320311182.

The previous prime is 2640622301. The next prime is 2640622379. The reversal of 2640622366 is 6632260462.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6632260462 = 2 ⋅3316130231.

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 as a sum of consecutive naturals, namely, 660155590 + ... + 660155593.

It is an arithmetic number, because the mean of its divisors is an integer number (990233388).

Almost surely, 2^2640622366 is an apocalyptic number.

2640622366 is a deficient number, since it is larger than the sum of its proper divisors (1320311186).

2640622366 is a wasteful number, since it uses less digits than its factorization.

2640622366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320311185.

The product of its (nonzero) digits is 124416, while the sum is 37.

The square root of 2640622366 is about 51386.9863486856. The cubic root of 2640622366 is about 1382.1932438442.

The spelling of 2640622366 in words is "two billion, six hundred forty million, six hundred twenty-two thousand, three hundred sixty-six".