61666883 has 4 divisors (see below), whose sum is σ = 61799400. Its totient is φ = 61534368.

The previous prime is 61666861. The next prime is 61666889. The reversal of 61666883 is 38866616.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61666883 - 2⁶ = 61666819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61666889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65558 + ... + 66491.

It is an arithmetic number, because the mean of its divisors is an integer number (15449850).

Almost surely, 2^61666883 is an apocalyptic number.

61666883 is a deficient number, since it is larger than the sum of its proper divisors (132517).

61666883 is a wasteful number, since it uses less digits than its factorization.

61666883 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132516.

The product of its digits is 248832, while the sum is 44.

The square root of 61666883 is about 7852.8264338390. The cubic root of 61666883 is about 395.0790484321.

The spelling of 61666883 in words is "sixty-one million, six hundred sixty-six thousand, eight hundred eighty-three".