66974648741 has 32 divisors (see below), whose sum is σ = 91266244608. Its totient is φ = 47454517440.

The previous prime is 66974648737. The next prime is 66974648743. The reversal of 66974648741 is 14784647966.

It is not a de Polignac number, because 66974648741 - 2² = 66974648737 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66974648743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 432245 + ... + 566378.

It is an arithmetic number, because the mean of its divisors is an integer number (2852070144).

Almost surely, 2^66974648741 is an apocalyptic number.

It is an amenable number.

66974648741 is a deficient number, since it is larger than the sum of its proper divisors (24291595867).

66974648741 is a wasteful number, since it uses less digits than its factorization.

66974648741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998721.

The product of its digits is 48771072, while the sum is 62.

The spelling of 66974648741 in words is "sixty-six billion, nine hundred seventy-four million, six hundred forty-eight thousand, seven hundred forty-one".