101666441 has 2 divisors, whose sum is σ = 101666442. Its totient is φ = 101666440.

The previous prime is 101666419. The next prime is 101666483. The reversal of 101666441 is 144666101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67980025 + 33686416 = 8245^2 + 5804^2 .

It is a cyclic number.

It is not a de Polignac number, because 101666441 - 2²⁶ = 34557577 is a prime.

It is not a weakly prime, because it can be changed into another prime (101666401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50833220 + 50833221.

It is an arithmetic number, because the mean of its divisors is an integer number (50833221).

Almost surely, 2^101666441 is an apocalyptic number.

It is an amenable number.

101666441 is a deficient number, since it is larger than the sum of its proper divisors (1).

101666441 is an equidigital number, since it uses as much as digits as its factorization.

101666441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 101666441 is about 10082.9777843651. The cubic root of 101666441 is about 466.7230037995.

The spelling of 101666441 in words is "one hundred one million, six hundred sixty-six thousand, four hundred forty-one".