61666411 has 8 divisors (see below), whose sum is σ = 62740224. Its totient is φ = 60598440.

The previous prime is 61666403. The next prime is 61666417. The reversal of 61666411 is 11466616.

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

It is a cyclic number.

It is not a de Polignac number, because 61666411 - 2³ = 61666403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61666417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23386 + ... + 25888.

It is an arithmetic number, because the mean of its divisors is an integer number (7842528).

Almost surely, 2^61666411 is an apocalyptic number.

61666411 is a deficient number, since it is larger than the sum of its proper divisors (1073813).

61666411 is a wasteful number, since it uses less digits than its factorization.

61666411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2921.

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

The square root of 61666411 is about 7852.7963809079. The cubic root of 61666411 is about 395.0780404476.

The spelling of 61666411 in words is "sixty-one million, six hundred sixty-six thousand, four hundred eleven".