66867653952 has 280 divisors, whose sum is σ = 227620921440. Its totient is φ = 19196144640.

The previous prime is 66867653899. The next prime is 66867653977. The reversal of 66867653952 is 25935676866.

It is a self number, because there is not a number n which added to its sum of digits gives 66867653952.

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 in 39 ways as a sum of consecutive naturals, for example, 1052598 + ... + 1114314.

Almost surely, 2^66867653952 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66867653952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113810460720).

66867653952 is an abundant number, since it is smaller than the sum of its proper divisors (160753267488).

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

66867653952 is a wasteful number, since it uses less digits than its factorization.

66867653952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61771 (or 61752 counting only the distinct ones).

The product of its digits is 97977600, while the sum is 63.

The spelling of 66867653952 in words is "sixty-six billion, eight hundred sixty-seven million, six hundred fifty-three thousand, nine hundred fifty-two".