65664706701551 has 8 divisors (see below), whose sum is σ = 66623242862064. Its totient is φ = 64710156139200.

The previous prime is 65664706701509. The next prime is 65664706701557. The reversal of 65664706701551 is 15510760746656.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65664706701551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65664706701557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 996366350 + ... + 996432251.

It is an arithmetic number, because the mean of its divisors is an integer number (8327905357758).

Almost surely, 2^{65664706701551} is an apocalyptic number.

65664706701551 is a deficient number, since it is larger than the sum of its proper divisors (958536160513).

65664706701551 is a wasteful number, since it uses less digits than its factorization.

65664706701551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1992799081.

The product of its (nonzero) digits is 31752000, while the sum is 59.

The spelling of 65664706701551 in words is "sixty-five trillion, six hundred sixty-four billion, seven hundred six million, seven hundred one thousand, five hundred fifty-one".