66379007772 has 864 divisors, whose sum is σ = 241375680000. Its totient is φ = 15200317440.

The previous prime is 66379007743. The next prime is 66379007803. The reversal of 66379007772 is 27770097366.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 745831504 + ... + 745831592.

It is an arithmetic number, because the mean of its divisors is an integer number (279370000).

Almost surely, 2^66379007772 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 66379007772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120687840000).

66379007772 is an abundant number, since it is smaller than the sum of its proper divisors (174996672228).

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

66379007772 is a wasteful number, since it uses less digits than its factorization.

66379007772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184 (or 148 counting only the distinct ones).

The product of its (nonzero) digits is 4667544, while the sum is 54.

The spelling of 66379007772 in words is "sixty-six billion, three hundred seventy-nine million, seven thousand, seven hundred seventy-two".