66566006551 has 16 divisors (see below), whose sum is σ = 76463101440. Its totient is φ = 57311824320.

The previous prime is 66566006539. The next prime is 66566006567. The reversal of 66566006551 is 15560066566.

It is a cyclic number.

It is not a de Polignac number, because 66566006551 - 2¹⁷ = 66565875479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66566006851) 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 15 ways as a sum of consecutive naturals, for example, 651051 + ... + 746323.

It is an arithmetic number, because the mean of its divisors is an integer number (4778943840).

Almost surely, 2^66566006551 is an apocalyptic number.

66566006551 is a deficient number, since it is larger than the sum of its proper divisors (9897094889).

66566006551 is a wasteful number, since it uses less digits than its factorization.

66566006551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98646.

The product of its (nonzero) digits is 972000, while the sum is 46.

The spelling of 66566006551 in words is "sixty-six billion, five hundred sixty-six million, six thousand, five hundred fifty-one".