2640036766 has 4 divisors (see below), whose sum is σ = 3960055152. Its totient is φ = 1320018382.

The previous prime is 2640036713. The next prime is 2640036827. The reversal of 2640036766 is 6676300462.

It is a semiprime because it is the product of two primes.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 660009190 + ... + 660009193.

It is an arithmetic number, because the mean of its divisors is an integer number (990013788).

Almost surely, 2^2640036766 is an apocalyptic number.

2640036766 is a deficient number, since it is larger than the sum of its proper divisors (1320018386).

2640036766 is a wasteful number, since it uses less digits than its factorization.

2640036766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320018385.

The product of its (nonzero) digits is 217728, while the sum is 40.

The square root of 2640036766 is about 51381.2880920671. The cubic root of 2640036766 is about 1382.0910618467.

The spelling of 2640036766 in words is "two billion, six hundred forty million, thirty-six thousand, seven hundred sixty-six".