61718166 has 16 divisors (see below), whose sum is σ = 137151600. Its totient is φ = 20572704.

The previous prime is 61718159. The next prime is 61718233. The reversal of 61718166 is 66181716.

It is a self number, because there is not a number n which added to its sum of digits gives 61718166.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 571411 + ... + 571518.

It is an arithmetic number, because the mean of its divisors is an integer number (8571975).

Almost surely, 2^61718166 is an apocalyptic number.

61718166 is an abundant number, since it is smaller than the sum of its proper divisors (75433434).

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

61718166 is a wasteful number, since it uses less digits than its factorization.

61718166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1142940 (or 1142934 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 61718166 is about 7856.0910127111. The cubic root of 61718166 is about 395.1885357509.

The spelling of 61718166 in words is "sixty-one million, seven hundred eighteen thousand, one hundred sixty-six".