61223566 has 8 divisors (see below), whose sum is σ = 92035944. Its totient is φ = 30544920.

The previous prime is 61223557. The next prime is 61223597. The reversal of 61223566 is 66532216.

61223566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32280 + ... + 34123.

It is an arithmetic number, because the mean of its divisors is an integer number (11504493).

Almost surely, 2^61223566 is an apocalyptic number.

61223566 is a deficient number, since it is larger than the sum of its proper divisors (30812378).

61223566 is a wasteful number, since it uses less digits than its factorization.

61223566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66866.

The product of its digits is 12960, while the sum is 31.

The square root of 61223566 is about 7824.5489326862. The cubic root of 61223566 is about 394.1300428784.

The spelling of 61223566 in words is "sixty-one million, two hundred twenty-three thousand, five hundred sixty-six".