66737473698 has 64 divisors (see below), whose sum is σ = 155773347840. Its totient is φ = 18666720000.

The previous prime is 66737473679. The next prime is 66737473717. The reversal of 66737473698 is 89637473766.

It is an interprime number because it is at equal distance from previous prime (66737473679) and next prime (66737473717).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 541323 + ... + 653073.

It is an arithmetic number, because the mean of its divisors is an integer number (2433958560).

Almost surely, 2^66737473698 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66737473698, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77886673920).

66737473698 is an abundant number, since it is smaller than the sum of its proper divisors (89035874142).

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

66737473698 is a wasteful number, since it uses less digits than its factorization.

66737473698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112063.

The product of its digits is 192036096, while the sum is 66.

The spelling of 66737473698 in words is "sixty-six billion, seven hundred thirty-seven million, four hundred seventy-three thousand, six hundred ninety-eight".