101666442 has 8 divisors (see below), whose sum is σ = 203332896. Its totient is φ = 33888812.

The previous prime is 101666441. The next prime is 101666483. The reversal of 101666442 is 244666101.

It is a sphenic number, since it is the product of 3 distinct primes.

101666442 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (101666441) 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 in 3 ways as a sum of consecutive naturals, for example, 8472198 + ... + 8472209.

It is an arithmetic number, because the mean of its divisors is an integer number (25416612).

Almost surely, 2^101666442 is an apocalyptic number.

101666442 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

101666442 is a wasteful number, since it uses less digits than its factorization.

101666442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16944412.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 101666442 is about 10082.9778339536. The cubic root of 101666442 is about 466.7230053297.

The spelling of 101666442 in words is "one hundred one million, six hundred sixty-six thousand, four hundred forty-two".