101666443 has 24 divisors (see below), whose sum is σ = 112681280. Its totient is φ = 91653120.

The previous prime is 101666441. The next prime is 101666483. The reversal of 101666443 is 344666101.

It is not a de Polignac number, because 101666443 - 2¹ = 101666441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101666441) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1286878 + ... + 1286956.

Almost surely, 2^101666443 is an apocalyptic number.

101666443 is a deficient number, since it is larger than the sum of its proper divisors (11014837).

101666443 is an equidigital number, since it uses as much as digits as its factorization.

101666443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247 (or 230 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 101666443 is about 10082.9778835421. The cubic root of 101666443 is about 466.7230068600.

The spelling of 101666443 in words is "one hundred one million, six hundred sixty-six thousand, four hundred forty-three".