100661155 has 16 divisors (see below), whose sum is σ = 139716864. Its totient is φ = 68191200.

The previous prime is 100661153. The next prime is 100661167. The reversal of 100661155 is 551166001.

It is not a de Polignac number, because 100661155 - 2¹ = 100661153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (100661153) 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, 14421 + ... + 20230.

It is an arithmetic number, because the mean of its divisors is an integer number (8732304).

Almost surely, 2^100661155 is an apocalyptic number.

100661155 is a deficient number, since it is larger than the sum of its proper divisors (39055709).

100661155 is an equidigital number, since it uses as much as digits as its factorization.

100661155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34746.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 100661155 is about 10033.0032891453. The cubic root of 100661155 is about 465.1795737619.

The spelling of 100661155 in words is "one hundred million, six hundred sixty-one thousand, one hundred fifty-five".