101664442 has 32 divisors (see below), whose sum is σ = 169460928. Its totient is φ = 45738000.

The previous prime is 101664391. The next prime is 101664449. The reversal of 101664442 is 244466101.

It is a self number, because there is not a number n which added to its sum of digits gives 101664442.

It is not an unprimeable number, because it can be changed into a prime (101664449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 481717 + ... + 481927.

It is an arithmetic number, because the mean of its divisors is an integer number (5295654).

Almost surely, 2^101664442 is an apocalyptic number.

101664442 is a deficient number, since it is larger than the sum of its proper divisors (67796486).

101664442 is a wasteful number, since it uses less digits than its factorization.

101664442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427 (or 405 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 101664442 is about 10082.8786564155. The cubic root of 101664442 is about 466.7199448242.

The spelling of 101664442 in words is "one hundred one million, six hundred sixty-four thousand, four hundred forty-two".