13620436766 has 4 divisors (see below), whose sum is σ = 20430655152. Its totient is φ = 6810218382.

The previous prime is 13620436751. The next prime is 13620436777. The reversal of 13620436766 is 66763402631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66763402631 = 25163 ⋅2653237.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3405109190 + ... + 3405109193.

It is an arithmetic number, because the mean of its divisors is an integer number (5107663788).

Almost surely, 2^13620436766 is an apocalyptic number.

13620436766 is a deficient number, since it is larger than the sum of its proper divisors (6810218386).

13620436766 is an equidigital number, since it uses as much as digits as its factorization.

13620436766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6810218385.

The product of its (nonzero) digits is 653184, while the sum is 44.

The spelling of 13620436766 in words is "thirteen billion, six hundred twenty million, four hundred thirty-six thousand, seven hundred sixty-six".