66361368612 has 192 divisors, whose sum is σ = 196326144000. Its totient is φ = 16945873920.

The previous prime is 66361368587. The next prime is 66361368613. The reversal of 66361368612 is 21686316366.

It is not an unprimeable number, because it can be changed into a prime (66361368613) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 23539339 + ... + 23542157.

It is an arithmetic number, because the mean of its divisors is an integer number (1022532000).

Almost surely, 2^66361368612 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 66361368612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98163072000).

66361368612 is an abundant number, since it is smaller than the sum of its proper divisors (129964775388).

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

66361368612 is a wasteful number, since it uses less digits than its factorization.

66361368612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3266 (or 3264 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 48.

The spelling of 66361368612 in words is "sixty-six billion, three hundred sixty-one million, three hundred sixty-eight thousand, six hundred twelve".