61166722223 has 4 divisors (see below), whose sum is σ = 61168133208. Its totient is φ = 61165311240.

The previous prime is 61166722213. The next prime is 61166722237. The reversal of 61166722223 is 32222766116.

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

It is a cyclic number.

It is not a de Polignac number, because 61166722223 - 2¹⁸ = 61166460079 is a prime.

It is a super-3 number, since 3×61166722223³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61166722213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 638336 + ... + 727877.

It is an arithmetic number, because the mean of its divisors is an integer number (15292033302).

Almost surely, 2^61166722223 is an apocalyptic number.

61166722223 is a deficient number, since it is larger than the sum of its proper divisors (1410985).

61166722223 is a wasteful number, since it uses less digits than its factorization.

61166722223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1410984.

The product of its digits is 72576, while the sum is 38.

The spelling of 61166722223 in words is "sixty-one billion, one hundred sixty-six million, seven hundred twenty-two thousand, two hundred twenty-three".