66421001358723 has 8 divisors (see below), whose sum is σ = 96612365612736. Its totient is φ = 40255152338600.

The previous prime is 66421001358721. The next prime is 66421001358731. The reversal of 66421001358723 is 32785310012466.

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 66421001358723 - 2¹ = 66421001358721 is a prime.

It is a super-2 number, since 2×66421001358723² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66421001358721) 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, 1006378808433 + ... + 1006378808498.

It is an arithmetic number, because the mean of its divisors is an integer number (12076545701592).

Almost surely, 2^{66421001358723} is an apocalyptic number.

66421001358723 is a deficient number, since it is larger than the sum of its proper divisors (30191364254013).

66421001358723 is a wasteful number, since it uses less digits than its factorization.

66421001358723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2012757616945.

The product of its (nonzero) digits is 1451520, while the sum is 48.

The spelling of 66421001358723 in words is "sixty-six trillion, four hundred twenty-one billion, one million, three hundred fifty-eight thousand, seven hundred twenty-three".