101990566 has 16 divisors (see below), whose sum is σ = 155280384. Its totient is φ = 50234184.

The previous prime is 101990557. The next prime is 101990591. The reversal of 101990566 is 665099101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76195 + ... + 77521.

It is an arithmetic number, because the mean of its divisors is an integer number (9705024).

Almost surely, 2^101990566 is an apocalyptic number.

101990566 is a deficient number, since it is larger than the sum of its proper divisors (53289818).

101990566 is a wasteful number, since it uses less digits than its factorization.

101990566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1875.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 101990566 is about 10099.0378749661. The cubic root of 101990566 is about 467.2184675714.

The spelling of 101990566 in words is "one hundred one million, nine hundred ninety thousand, five hundred sixty-six".