61666674 has 8 divisors (see below), whose sum is σ = 123333360. Its totient is φ = 20555556.

The previous prime is 61666651. The next prime is 61666681. The reversal of 61666674 is 47666616.

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

61666674 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, 5138884 + ... + 5138895.

It is an arithmetic number, because the mean of its divisors is an integer number (15416670).

Almost surely, 2^61666674 is an apocalyptic number.

61666674 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.

61666674 is a wasteful number, since it uses less digits than its factorization.

61666674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10277784.

The product of its digits is 217728, while the sum is 42.

The square root of 61666674 is about 7852.8131265171. The cubic root of 61666674 is about 395.0786021006.

The spelling of 61666674 in words is "sixty-one million, six hundred sixty-six thousand, six hundred seventy-four".