66496054590 has 192 divisors, whose sum is σ = 204975912960. Its totient is φ = 14640238080.

The previous prime is 66496054543. The next prime is 66496054613. The reversal of 66496054590 is 9545069466.

66496054590 is a `hidden beast` number, since 6 + 6 + 4 + 9 + 6 + 0 + 545 + 90 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2024277 + ... + 2056863.

It is an arithmetic number, because the mean of its divisors is an integer number (1067582880).

Almost surely, 2^66496054590 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66496054590, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102487956480).

66496054590 is an abundant number, since it is smaller than the sum of its proper divisors (138479858370).

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

66496054590 is a wasteful number, since it uses less digits than its factorization.

66496054590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32727 (or 32724 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 54.

The spelling of 66496054590 in words is "sixty-six billion, four hundred ninety-six million, fifty-four thousand, five hundred ninety".