1866122241 has 8 divisors (see below), whose sum is σ = 2490116544. Its totient is φ = 1243104720.

The previous prime is 1866122239. The next prime is 1866122267. The reversal of 1866122241 is 1422216681.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1866122241 - 2¹ = 1866122239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1866121241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239725 + ... + 247386.

It is an arithmetic number, because the mean of its divisors is an integer number (311264568).

Almost surely, 2^1866122241 is an apocalyptic number.

It is an amenable number.

1866122241 is a deficient number, since it is larger than the sum of its proper divisors (623994303).

1866122241 is a wasteful number, since it uses less digits than its factorization.

1866122241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488391.

The product of its digits is 9216, while the sum is 33.

The square root of 1866122241 is about 43198.6370271100. The cubic root of 1866122241 is about 1231.1567853504.

The spelling of 1866122241 in words is "one billion, eight hundred sixty-six million, one hundred twenty-two thousand, two hundred forty-one".