61085666 has 4 divisors (see below), whose sum is σ = 91628502. Its totient is φ = 30542832.

The previous prime is 61085659. The next prime is 61085683. The reversal of 61085666 is 66658016.

61085666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 60388441 + 697225 = 7771^2 + 835^2 .

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 as a sum of consecutive naturals, namely, 15271415 + ... + 15271418.

Almost surely, 2^61085666 is an apocalyptic number.

61085666 is a deficient number, since it is larger than the sum of its proper divisors (30542836).

61085666 is a wasteful number, since it uses less digits than its factorization.

61085666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30542835.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 61085666 is about 7815.7319554857. The cubic root of 61085666 is about 393.8339075066.

The spelling of 61085666 in words is "sixty-one million, eighty-five thousand, six hundred sixty-six".