61661706 has 8 divisors (see below), whose sum is σ = 123323424. Its totient is φ = 20553900.

The previous prime is 61661683. The next prime is 61661723. The reversal of 61661706 is 60716616.

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

61661706 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5138470 + ... + 5138481.

It is an arithmetic number, because the mean of its divisors is an integer number (15415428).

Almost surely, 2^61661706 is an apocalyptic number.

61661706 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61661706 is a wasteful number, since it uses less digits than its factorization.

61661706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10276956.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 61661706 is about 7852.4968003814. The cubic root of 61661706 is about 395.0679923548.

The spelling of 61661706 in words is "sixty-one million, six hundred sixty-one thousand, seven hundred six".