61666114 has 4 divisors (see below), whose sum is σ = 92499174. Its totient is φ = 30833056.

The previous prime is 61666103. The next prime is 61666117. The reversal of 61666114 is 41166616.

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., 35605089 + 26061025 = 5967^2 + 5105^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (61666117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15416527 + ... + 15416530.

Almost surely, 2^61666114 is an apocalyptic number.

61666114 is a deficient number, since it is larger than the sum of its proper divisors (30833060).

61666114 is a wasteful number, since it uses less digits than its factorization.

61666114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30833059.

The product of its digits is 5184, while the sum is 31.

The square root of 61666114 is about 7852.7774704241. Note that the first 3 decimals coincide. The cubic root of 61666114 is about 395.0774061835.

The spelling of 61666114 in words is "sixty-one million, six hundred sixty-six thousand, one hundred fourteen".