100665025 has 12 divisors (see below), whose sum is σ = 124964224. Its totient is φ = 80442000.

The previous prime is 100665013. The next prime is 100665079. The reversal of 100665025 is 520566001.

It is not a de Polignac number, because 100665025 - 2¹³ = 100656833 is a prime.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29140 + ... + 32410.

Almost surely, 2^100665025 is an apocalyptic number.

It is an amenable number.

100665025 is a deficient number, since it is larger than the sum of its proper divisors (24299199).

100665025 is a wasteful number, since it uses less digits than its factorization.

100665025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4512 (or 4507 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 100665025 is about 10033.1961507787. The cubic root of 100665025 is about 465.1855350879.

The spelling of 100665025 in words is "one hundred million, six hundred sixty-five thousand, twenty-five".