66756705504436 has 24 divisors (see below), whose sum is σ = 117959579285184. Its totient is φ = 33053974768320.

The previous prime is 66756705504421. The next prime is 66756705504451. The reversal of 66756705504436 is 63440550765766.

It is an interprime number because it is at equal distance from previous prime (66756705504421) and next prime (66756705504451).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45709776 + ... + 47147608.

It is an arithmetic number, because the mean of its divisors is an integer number (4914982470216).

Almost surely, 2^{66756705504436} is an apocalyptic number.

It is an amenable number.

66756705504436 is a deficient number, since it is larger than the sum of its proper divisors (51202873780748).

66756705504436 is a wasteful number, since it uses less digits than its factorization.

66756705504436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1550631 (or 1550629 counting only the distinct ones).

The product of its (nonzero) digits is 381024000, while the sum is 64.

The spelling of 66756705504436 in words is "sixty-six trillion, seven hundred fifty-six billion, seven hundred five million, five hundred four thousand, four hundred thirty-six".