104261661 has 60 divisors (see below), whose sum is σ = 183598140. Its totient is φ = 58786560.

The previous prime is 104261657. The next prime is 104261669. The reversal of 104261661 is 166162401.

104261661 is a `hidden beast` number, since 1 + 0 + 42 + 616 + 6 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 75585636 + 28676025 = 8694^2 + 5355^2 .

It is not a de Polignac number, because 104261661 - 2² = 104261657 is a prime.

It is a hoax number, since the sum of its digits (27) 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 (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104261669) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 432501 + ... + 432741.

It is an arithmetic number, because the mean of its divisors is an integer number (3059969).

Almost surely, 2^104261661 is an apocalyptic number.

It is an amenable number.

104261661 is a deficient number, since it is larger than the sum of its proper divisors (79336479).

104261661 is a wasteful number, since it uses less digits than its factorization.

104261661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376 (or 360 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 104261661 is about 10210.8599539902. The cubic root of 104261661 is about 470.6609999287.

The spelling of 104261661 in words is "one hundred four million, two hundred sixty-one thousand, six hundred sixty-one".