66763733952 has 112 divisors (see below), whose sum is σ = 178451195040. Its totient is φ = 22027665408.

The previous prime is 66763733923. The next prime is 66763733977. The reversal of 66763733952 is 25933736766.

It is a junction number, because it is equal to n+sod(n) for n = 66763733892 and 66763733901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20674674 + ... + 20677902.

Almost surely, 2^66763733952 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 66763733952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89225597520).

66763733952 is an abundant number, since it is smaller than the sum of its proper divisors (111687461088).

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

66763733952 is a wasteful number, since it uses less digits than its factorization.

66763733952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4310 (or 4300 counting only the distinct ones).

The product of its digits is 25719120, while the sum is 57.

The spelling of 66763733952 in words is "sixty-six billion, seven hundred sixty-three million, seven hundred thirty-three thousand, nine hundred fifty-two".