2261233666 has 4 divisors (see below), whose sum is σ = 3391850502. Its totient is φ = 1130616832.

The previous prime is 2261233549. The next prime is 2261233679. The reversal of 2261233666 is 6663321622.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2193517225 + 67716441 = 46835^2 + 8229^2 .

It is a super-3 number, since 3×2261233666³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565308415 + ... + 565308418.

Almost surely, 2^2261233666 is an apocalyptic number.

2261233666 is a deficient number, since it is larger than the sum of its proper divisors (1130616836).

2261233666 is a wasteful number, since it uses less digits than its factorization.

2261233666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130616835.

The product of its digits is 93312, while the sum is 37.

The square root of 2261233666 is about 47552.4307054855. The cubic root of 2261233666 is about 1312.5478580403.

The spelling of 2261233666 in words is "two billion, two hundred sixty-one million, two hundred thirty-three thousand, six hundred sixty-six".