1866660103 has 12 divisors (see below), whose sum is σ = 2344896400. Its totient is φ = 1454539680.

The previous prime is 1866660091. The next prime is 1866660119. The reversal of 1866660103 is 3010666681.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1866660103 is a prime.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1866660403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1101078 + ... + 1102771.

Almost surely, 2^1866660103 is an apocalyptic number.

1866660103 is a deficient number, since it is larger than the sum of its proper divisors (478236297).

1866660103 is a wasteful number, since it uses less digits than its factorization.

1866660103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2203878 (or 2203867 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 1866660103 is about 43204.8620296374. The cubic root of 1866660103 is about 1231.2750571382.

The spelling of 1866660103 in words is "one billion, eight hundred sixty-six million, six hundred sixty thousand, one hundred three".