101666419 has 2 divisors, whose sum is σ = 101666420. Its totient is φ = 101666418.

The previous prime is 101666401. The next prime is 101666441. The reversal of 101666419 is 914666101.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 101666419 - 2¹¹ = 101664371 is a prime.

It is a super-2 number, since 2×101666419² = 20672121504567122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (101666219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50833209 + 50833210.

It is an arithmetic number, because the mean of its divisors is an integer number (50833210).

Almost surely, 2^101666419 is an apocalyptic number.

101666419 is a deficient number, since it is larger than the sum of its proper divisors (1).

101666419 is an equidigital number, since it uses as much as digits as its factorization.

101666419 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 101666419 is about 10082.9766934175. The cubic root of 101666419 is about 466.7229701341.

The spelling of 101666419 in words is "one hundred one million, six hundred sixty-six thousand, four hundred nineteen".