66502332156 has 72 divisors (see below), whose sum is σ = 168467281920. Its totient is φ = 20408591424.

The previous prime is 66502332137. The next prime is 66502332271. The reversal of 66502332156 is 65123320566.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 733915 + ... + 819533.

It is an arithmetic number, because the mean of its divisors is an integer number (2339823360).

Almost surely, 2^66502332156 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 66502332156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84233640960).

66502332156 is an abundant number, since it is smaller than the sum of its proper divisors (101964949764).

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

66502332156 is a wasteful number, since it uses less digits than its factorization.

66502332156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86035 (or 86020 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 39.

The spelling of 66502332156 in words is "sixty-six billion, five hundred two million, three hundred thirty-two thousand, one hundred fifty-six".