61166667228 has 48 divisors (see below), whose sum is σ = 143575539744. Its totient is φ = 20267089920.

The previous prime is 61166667173. The next prime is 61166667229. The reversal of 61166667228 is 82276666116.

It is a super-2 number, since 2×61166667228² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61166667229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6200476 + ... + 6210332.

It is an arithmetic number, because the mean of its divisors is an integer number (2991157078).

Almost surely, 2^61166667228 is an apocalyptic number.

It is an amenable number.

61166667228 is an abundant number, since it is smaller than the sum of its proper divisors (82408872516).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61166667228 is a wasteful number, since it uses less digits than its factorization.

61166667228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12902 (or 12900 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 51.

The spelling of 61166667228 in words is "sixty-one billion, one hundred sixty-six million, six hundred sixty-seven thousand, two hundred twenty-eight".