66005501416451 has 8 divisors (see below), whose sum is σ = 66374635698000. Its totient is φ = 65636371451520.

The previous prime is 66005501416447. The next prime is 66005501416471. The reversal of 66005501416451 is 15461410550066.

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 66005501416451 - 2² = 66005501416447 is a prime.

It is a super-2 number, since 2×66005501416451² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66005501416471) 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, 32501975 + ... + 34473023.

It is an arithmetic number, because the mean of its divisors is an integer number (8296829462250).

Almost surely, 2^{66005501416451} is an apocalyptic number.

66005501416451 is a deficient number, since it is larger than the sum of its proper divisors (369134281549).

66005501416451 is a wasteful number, since it uses less digits than its factorization.

66005501416451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2158309.

The product of its (nonzero) digits is 432000, while the sum is 44.

The spelling of 66005501416451 in words is "sixty-six trillion, five billion, five hundred one million, four hundred sixteen thousand, four hundred fifty-one".