61666467 has 4 divisors (see below), whose sum is σ = 82221960. Its totient is φ = 41110976.

The previous prime is 61666453. The next prime is 61666483. The reversal of 61666467 is 76466616.

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 61666467 - 2⁶ = 61666403 is a prime.

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 3 ways as a sum of consecutive naturals, for example, 10277742 + ... + 10277747.

It is an arithmetic number, because the mean of its divisors is an integer number (20555490).

Almost surely, 2^61666467 is an apocalyptic number.

61666467 is a deficient number, since it is larger than the sum of its proper divisors (20555493).

61666467 is a wasteful number, since it uses less digits than its factorization.

61666467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20555492.

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

The square root of 61666467 is about 7852.7999465159. The cubic root of 61666467 is about 395.0781600392.

The spelling of 61666467 in words is "sixty-one million, six hundred sixty-six thousand, four hundred sixty-seven".