66768252892 has 48 divisors (see below), whose sum is σ = 132364108800. Its totient is φ = 29191117760.

The previous prime is 66768252853. The next prime is 66768252899. The reversal of 66768252892 is 29825286766.

It is a self number, because there is not a number n which added to its sum of digits gives 66768252892.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66768252899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 236109 + ... + 435067.

It is an arithmetic number, because the mean of its divisors is an integer number (2757585600).

Almost surely, 2^66768252892 is an apocalyptic number.

It is an amenable number.

66768252892 is a deficient number, since it is larger than the sum of its proper divisors (65595855908).

66768252892 is a wasteful number, since it uses less digits than its factorization.

66768252892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199266 (or 199264 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 61.

The spelling of 66768252892 in words is "sixty-six billion, seven hundred sixty-eight million, two hundred fifty-two thousand, eight hundred ninety-two".