66621323127 has 8 divisors (see below), whose sum is σ = 88830080640. Its totient is φ = 44413390520.

The previous prime is 66621323107. The next prime is 66621323159. The reversal of 66621323127 is 72132312666.

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 66621323127 - 2⁸ = 66621322871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66621323107) 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, 16624 + ... + 365402.

It is an arithmetic number, because the mean of its divisors is an integer number (11103760080).

Almost surely, 2^66621323127 is an apocalyptic number.

66621323127 is a deficient number, since it is larger than the sum of its proper divisors (22208757513).

66621323127 is a wasteful number, since it uses less digits than its factorization.

66621323127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412453.

The product of its digits is 108864, while the sum is 39.

The spelling of 66621323127 in words is "sixty-six billion, six hundred twenty-one million, three hundred twenty-three thousand, one hundred twenty-seven".