66897314739 has 12 divisors (see below), whose sum is σ = 96683131272. Its totient is φ = 44573436000.

The previous prime is 66897314717. The next prime is 66897314761. The reversal of 66897314739 is 93741379866.

66897314739 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (66897314717) and next prime (66897314761).

It is not a de Polignac number, because 66897314739 - 2¹⁶ = 66897249203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66897312739) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2047377 + ... + 2079794.

It is an arithmetic number, because the mean of its divisors is an integer number (8056927606).

Almost surely, 2^66897314739 is an apocalyptic number.

66897314739 is a deficient number, since it is larger than the sum of its proper divisors (29785816533).

66897314739 is a wasteful number, since it uses less digits than its factorization.

66897314739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4128978 (or 4128975 counting only the distinct ones).

The product of its digits is 41150592, while the sum is 63.

The spelling of 66897314739 in words is "sixty-six billion, eight hundred ninety-seven million, three hundred fourteen thousand, seven hundred thirty-nine".