66584076651 has 16 divisors (see below), whose sum is σ = 98832431520. Its totient is φ = 44304174720.

The previous prime is 66584076641. The next prime is 66584076659. The reversal of 66584076651 is 15667048566.

66584076651 is a `hidden beast` number, since 6 + 6 + 584 + 0 + 7 + 6 + 6 + 51 = 666.

It is not a de Polignac number, because 66584076651 - 2¹⁷ = 66583945579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66584076659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2352610 + ... + 2380743.

It is an arithmetic number, because the mean of its divisors is an integer number (6177026970).

Almost surely, 2^66584076651 is an apocalyptic number.

66584076651 is a deficient number, since it is larger than the sum of its proper divisors (32248354869).

66584076651 is a wasteful number, since it uses less digits than its factorization.

66584076651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4733883 (or 4733877 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 54.

The spelling of 66584076651 in words is "sixty-six billion, five hundred eighty-four million, seventy-six thousand, six hundred fifty-one".