65655542766 has 64 divisors (see below), whose sum is σ = 144112608000. Its totient is φ = 19775938560.

The previous prime is 65655542759. The next prime is 65655542789. The reversal of 65655542766 is 66724555656.

It is a happy number.

65655542766 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8460160 + ... + 8467916.

It is an arithmetic number, because the mean of its divisors is an integer number (2251759500).

Almost surely, 2^65655542766 is an apocalyptic number.

65655542766 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

65655542766 is an abundant number, since it is smaller than the sum of its proper divisors (78457065234).

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

65655542766 is a wasteful number, since it uses less digits than its factorization.

65655542766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8529.

The product of its digits is 45360000, while the sum is 57.

The spelling of 65655542766 in words is "sixty-five billion, six hundred fifty-five million, five hundred forty-two thousand, seven hundred sixty-six".