101666505323 has 8 divisors (see below), whose sum is σ = 102434454528. Its totient is φ = 100900451304.

The previous prime is 101666505299. The next prime is 101666505329. The reversal of 101666505323 is 323505666101.

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 101666505323 - 2¹² = 101666501227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101666505329) 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, 366011 + ... + 580772.

It is an arithmetic number, because the mean of its divisors is an integer number (12804306816).

Almost surely, 2^101666505323 is an apocalyptic number.

101666505323 is a deficient number, since it is larger than the sum of its proper divisors (767949205).

101666505323 is an equidigital number, since it uses as much as digits as its factorization.

101666505323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 947593.

The product of its (nonzero) digits is 97200, while the sum is 38.

The spelling of 101666505323 in words is "one hundred one billion, six hundred sixty-six million, five hundred five thousand, three hundred twenty-three".