101666290 has 32 divisors (see below), whose sum is σ = 211382784. Its totient is φ = 34794240.

The previous prime is 101666281. The next prime is 101666293. The reversal of 101666290 is 92666101.

It is not an unprimeable number, because it can be changed into a prime (101666293) 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, 25314 + ... + 29053.

It is an arithmetic number, because the mean of its divisors is an integer number (6605712).

Almost surely, 2^101666290 is an apocalyptic number.

101666290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

101666290 is an abundant number, since it is smaller than the sum of its proper divisors (109716494).

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

101666290 is a wasteful number, since it uses less digits than its factorization.

101666290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54402.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 101666290 is about 10082.9702964950. The cubic root of 101666290 is about 466.7227727327.

The spelling of 101666290 in words is "one hundred one million, six hundred sixty-six thousand, two hundred ninety".