66041700516 has 240 divisors, whose sum is σ = 197178347520. Its totient is φ = 19092024000.

The previous prime is 66041700511. The next prime is 66041700583. The reversal of 66041700516 is 61500714066.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (66041700511) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 7840155 + ... + 7848573.

It is an arithmetic number, because the mean of its divisors is an integer number (821576448).

Almost surely, 2^66041700516 is an apocalyptic number.

66041700516 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66041700516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98589173760).

66041700516 is an abundant number, since it is smaller than the sum of its proper divisors (131136647004).

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

66041700516 is a wasteful number, since it uses less digits than its factorization.

66041700516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8548 (or 8537 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The spelling of 66041700516 in words is "sixty-six billion, forty-one million, seven hundred thousand, five hundred sixteen".