100561666 has 8 divisors (see below), whose sum is σ = 150892560. Its totient is φ = 50264148.

The previous prime is 100561639. The next prime is 100561667. The reversal of 100561666 is 666165001.

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

It is a super-2 number, since 2×100561666² = 20225297337391112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (100561667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1525 + ... + 14263.

It is an arithmetic number, because the mean of its divisors is an integer number (18861570).

Almost surely, 2^100561666 is an apocalyptic number.

100561666 is a deficient number, since it is larger than the sum of its proper divisors (50330894).

100561666 is a wasteful number, since it uses less digits than its factorization.

100561666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16688.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 100561666 is about 10028.0439767684. The cubic root of 100561666 is about 465.0262689904.

The spelling of 100561666 in words is "one hundred million, five hundred sixty-one thousand, six hundred sixty-six".