100666045 has 8 divisors (see below), whose sum is σ = 121569624. Its totient is φ = 80019264.

The previous prime is 100666003. The next prime is 100666063. The reversal of 100666045 is 540666001.

It can be written as a sum of positive squares in 4 ways, for example, as 125316 + 100540729 = 354^2 + 10027^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 100666045 - 2¹⁹ = 100141757 is a prime.

It is a Duffinian number.

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, 63334 + ... + 64903.

It is an arithmetic number, because the mean of its divisors is an integer number (15196203).

Almost surely, 2^100666045 is an apocalyptic number.

It is an amenable number.

100666045 is a deficient number, since it is larger than the sum of its proper divisors (20903579).

100666045 is a wasteful number, since it uses less digits than its factorization.

100666045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128399.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 100666045 is about 10033.2469819097. The cubic root of 100666045 is about 465.1871062647.

The spelling of 100666045 in words is "one hundred million, six hundred sixty-six thousand, forty-five".