66689137151 has 72 divisors (see below), whose sum is σ = 87577841520. Its totient is φ = 50548732416.

The previous prime is 66689137133. The next prime is 66689137201. The reversal of 66689137151 is 15173198666.

It is a de Polignac number, because none of the positive numbers 2^k-66689137151 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66689137093 and 66689137102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66689137121) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 32899400 + ... + 32901426.

It is an arithmetic number, because the mean of its divisors is an integer number (1216358910).

Almost surely, 2^66689137151 is an apocalyptic number.

66689137151 is a deficient number, since it is larger than the sum of its proper divisors (20888704369).

66689137151 is a wasteful number, since it uses less digits than its factorization.

66689137151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2233 (or 2213 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 53.

The spelling of 66689137151 in words is "sixty-six billion, six hundred eighty-nine million, one hundred thirty-seven thousand, one hundred fifty-one".