66596266044 has 432 divisors, whose sum is σ = 228901231104. Its totient is φ = 16540951680.

The previous prime is 66596266001. The next prime is 66596266063. The reversal of 66596266044 is 44066269566.

66596266044 is a `hidden beast` number, since 6 + 6 + 5 + 9 + 6 + 26 + 604 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 18933774 + ... + 18937290.

Almost surely, 2^66596266044 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 66596266044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114450615552).

66596266044 is an abundant number, since it is smaller than the sum of its proper divisors (162304965060).

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

66596266044 is a wasteful number, since it uses less digits than its factorization.

66596266044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3588 (or 3563 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 54.

The spelling of 66596266044 in words is "sixty-six billion, five hundred ninety-six million, two hundred sixty-six thousand, forty-four".