66511852470 has 192 divisors, whose sum is σ = 209430074880. Its totient is φ = 14296863744.

The previous prime is 66511852427. The next prime is 66511852501. The reversal of 66511852470 is 7425811566.

66511852470 is a `hidden beast` number, since 6 + 6 + 5 + 118 + 524 + 7 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 23592721 + ... + 23595539.

It is an arithmetic number, because the mean of its divisors is an integer number (1090781640).

Almost surely, 2^66511852470 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66511852470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104715037440).

66511852470 is an abundant number, since it is smaller than the sum of its proper divisors (142918222410).

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

66511852470 is a wasteful number, since it uses less digits than its factorization.

66511852470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5059 (or 5056 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The spelling of 66511852470 in words is "sixty-six billion, five hundred eleven million, eight hundred fifty-two thousand, four hundred seventy".