66520382898 has 16 divisors (see below), whose sum is σ = 133051905216. Its totient is φ = 22171604400.

The previous prime is 66520382891. The next prime is 66520382909. The reversal of 66520382898 is 89828302566.

It is a super-2 number, since 2×66520382898² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66520382891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 385486 + ... + 530697.

It is an arithmetic number, because the mean of its divisors is an integer number (8315744076).

Almost surely, 2^66520382898 is an apocalyptic number.

66520382898 is an abundant number, since it is smaller than the sum of its proper divisors (66531522318).

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

66520382898 is a wasteful number, since it uses less digits than its factorization.

66520382898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928289.

The product of its (nonzero) digits is 9953280, while the sum is 57.

The spelling of 66520382898 in words is "sixty-six billion, five hundred twenty million, three hundred eighty-two thousand, eight hundred ninety-eight".