66779147259 has 144 divisors (see below), whose sum is σ = 114496039840. Its totient is φ = 37362124800.

The previous prime is 66779147257. The next prime is 66779147269. The reversal of 66779147259 is 95274197766.

66779147259 is a `hidden beast` number, since 6 + 6 + 77 + 91 + 472 + 5 + 9 = 666.

It is not a de Polignac number, because 66779147259 - 2¹ = 66779147257 is a prime.

Its product of digits (40007520) is a multiple of the sum of its prime divisors (588).

It is a junction number, because it is equal to n+sod(n) for n = 66779147196 and 66779147205.

It is not an unprimeable number, because it can be changed into a prime (66779147257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 198157539 + ... + 198157875.

Almost surely, 2^66779147259 is an apocalyptic number.

66779147259 is a deficient number, since it is larger than the sum of its proper divisors (47716892581).

66779147259 is a wasteful number, since it uses less digits than its factorization.

66779147259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602 (or 588 counting only the distinct ones).

The product of its digits is 40007520, while the sum is 63.

The spelling of 66779147259 in words is "sixty-six billion, seven hundred seventy-nine million, one hundred forty-seven thousand, two hundred fifty-nine".