66616532023 has 8 divisors (see below), whose sum is σ = 66720812400. Its totient is φ = 66512291328.

The previous prime is 66616531991. The next prime is 66616532069. The reversal of 66616532023 is 32023561666.

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 66616532023 - 2⁵ = 66616531991 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 (66616532923) 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, 6285813 + ... + 6296401.

It is an arithmetic number, because the mean of its divisors is an integer number (8340101550).

Almost surely, 2^66616532023 is an apocalyptic number.

66616532023 is a deficient number, since it is larger than the sum of its proper divisors (104280377).

66616532023 is a wasteful number, since it uses less digits than its factorization.

66616532023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19841.

The product of its (nonzero) digits is 233280, while the sum is 40.

The spelling of 66616532023 in words is "sixty-six billion, six hundred sixteen million, five hundred thirty-two thousand, twenty-three".