101666450999 has 2 divisors, whose sum is σ = 101666451000. Its totient is φ = 101666450998.

The previous prime is 101666450989. The next prime is 101666451001. The reversal of 101666450999 is 999054666101.

It is a strong prime.

It is an emirp because it is prime and its reverse (999054666101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 101666450999 - 2⁴ = 101666450983 is a prime.

Together with 101666451001, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101666450909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50833225499 + 50833225500.

It is an arithmetic number, because the mean of its divisors is an integer number (50833225500).

Almost surely, 2^101666450999 is an apocalyptic number.

101666450999 is a deficient number, since it is larger than the sum of its proper divisors (1).

101666450999 is an equidigital number, since it uses as much as digits as its factorization.

101666450999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3149280, while the sum is 56.

The spelling of 101666450999 in words is "one hundred one billion, six hundred sixty-six million, four hundred fifty thousand, nine hundred ninety-nine".