100663645 has 16 divisors (see below), whose sum is σ = 125116992. Its totient is φ = 77696640.

The previous prime is 100663621. The next prime is 100663649. The reversal of 100663645 is 546366001.

It is not a de Polignac number, because 100663645 - 2⁷ = 100663517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100663649) 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, 15025 + ... + 20665.

It is an arithmetic number, because the mean of its divisors is an integer number (7819812).

Almost surely, 2^100663645 is an apocalyptic number.

It is an amenable number.

100663645 is a deficient number, since it is larger than the sum of its proper divisors (24453347).

100663645 is an equidigital number, since it uses as much as digits as its factorization.

100663645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5772.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 100663645 is about 10033.1273788386. The cubic root of 100663645 is about 465.1834093613.

The spelling of 100663645 in words is "one hundred million, six hundred sixty-three thousand, six hundred forty-five".