66502052772 has 24 divisors (see below), whose sum is σ = 155194376736. Its totient is φ = 22164076608.

The previous prime is 66502052761. The next prime is 66502052791. The reversal of 66502052772 is 27725020566.

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, 323953 + ... + 487800.

It is an arithmetic number, because the mean of its divisors is an integer number (6466432364).

Almost surely, 2^66502052772 is an apocalyptic number.

It is an amenable number.

66502052772 is an abundant number, since it is smaller than the sum of its proper divisors (88692323964).

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

66502052772 is a wasteful number, since it uses less digits than its factorization.

66502052772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818587 (or 818585 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 42.

The spelling of 66502052772 in words is "sixty-six billion, five hundred two million, fifty-two thousand, seven hundred seventy-two".