61061666 has 8 divisors (see below), whose sum is σ = 91755180. Its totient is φ = 30476608.

The previous prime is 61061659. The next prime is 61061683. The reversal of 61061666 is 66616016.

61061666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 60918025 + 143641 = 7805^2 + 379^2 .

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

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, 25691 + ... + 27966.

Almost surely, 2^61061666 is an apocalyptic number.

61061666 is a deficient number, since it is larger than the sum of its proper divisors (30693514).

61061666 is a wasteful number, since it uses less digits than its factorization.

61061666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54228.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 61061666 is about 7814.1964398139. The cubic root of 61061666 is about 393.7823228358.

The spelling of 61061666 in words is "sixty-one million, sixty-one thousand, six hundred sixty-six".