66087755651 has 8 divisors (see below), whose sum is σ = 70446643200. Its totient is φ = 61816926600.

The previous prime is 66087755627. The next prime is 66087755729. The reversal of 66087755651 is 15655778066.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66087755651 - 2²⁶ = 66020646787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66887755651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22013075 + ... + 22016076.

It is an arithmetic number, because the mean of its divisors is an integer number (8805830400).

Almost surely, 2^66087755651 is an apocalyptic number.

66087755651 is a deficient number, since it is larger than the sum of its proper divisors (4358887549).

66087755651 is a wasteful number, since it uses less digits than its factorization.

66087755651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44029249.

The product of its (nonzero) digits is 10584000, while the sum is 56.

The spelling of 66087755651 in words is "sixty-six billion, eighty-seven million, seven hundred fifty-five thousand, six hundred fifty-one".