66800148068 has 6 divisors (see below), whose sum is σ = 116900259126. Its totient is φ = 33400074032.

The previous prime is 66800148067. The next prime is 66800148071. The reversal of 66800148068 is 86084100866.

It can be written as a sum of positive squares in only one way, i.e., 51478164544 + 15321983524 = 226888^2 + 123782^2 .

It is not an unprimeable number, because it can be changed into a prime (66800148061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8350018505 + ... + 8350018512.

It is an arithmetic number, because the mean of its divisors is an integer number (19483376521).

Almost surely, 2^66800148068 is an apocalyptic number.

It is an amenable number.

66800148068 is a deficient number, since it is larger than the sum of its proper divisors (50100111058).

66800148068 is a wasteful number, since it uses less digits than its factorization.

66800148068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16700037021 (or 16700037019 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 47.

The spelling of 66800148068 in words is "sixty-six billion, eight hundred million, one hundred forty-eight thousand, sixty-eight".