100566945 has 24 divisors (see below), whose sum is σ = 179941632. Its totient is φ = 51904800.

The previous prime is 100566937. The next prime is 100566959. The reversal of 100566945 is 549665001.

100566945 is a `hidden beast` number, since 1 + 0 + 0 + 566 + 94 + 5 = 666.

It is not a de Polignac number, because 100566945 - 2³ = 100566937 is a prime.

It is a super-2 number, since 2×100566945² = 20227420853266050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34651 + ... + 37440.

It is an arithmetic number, because the mean of its divisors is an integer number (7497568).

Almost surely, 2^100566945 is an apocalyptic number.

100566945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

100566945 is a deficient number, since it is larger than the sum of its proper divisors (79374687).

100566945 is a wasteful number, since it uses less digits than its factorization.

100566945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72133 (or 72130 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 100566945 is about 10028.3071851634. The cubic root of 100566945 is about 465.0344060563.

The spelling of 100566945 in words is "one hundred million, five hundred sixty-six thousand, nine hundred forty-five".