100665550 has 24 divisors (see below), whose sum is σ = 190775736. Its totient is φ = 39505440.

The previous prime is 100665529. The next prime is 100665559. The reversal of 100665550 is 55566001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100665559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16344 + ... + 21643.

It is an arithmetic number, because the mean of its divisors is an integer number (7948989).

Almost surely, 2^100665550 is an apocalyptic number.

100665550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

100665550 is a deficient number, since it is larger than the sum of its proper divisors (90110186).

100665550 is a wasteful number, since it uses less digits than its factorization.

100665550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38052 (or 38047 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 100665550 is about 10033.2223138930. Note that the first 3 decimals coincide. The cubic root of 100665550 is about 465.1863437832.

The spelling of 100665550 in words is "one hundred million, six hundred sixty-five thousand, five hundred fifty".