66112061 has 4 divisors (see below), whose sum is σ = 66233472. Its totient is φ = 65990652.

The previous prime is 66112021. The next prime is 66112063. The reversal of 66112061 is 16021166.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66112061 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66112063) 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, 59885 + ... + 60978.

It is an arithmetic number, because the mean of its divisors is an integer number (16558368).

Almost surely, 2^66112061 is an apocalyptic number.

It is an amenable number.

66112061 is a deficient number, since it is larger than the sum of its proper divisors (121411).

66112061 is a wasteful number, since it uses less digits than its factorization.

66112061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121410.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 66112061 is about 8130.9323573622. The cubic root of 66112061 is about 404.3525926348.

The spelling of 66112061 in words is "sixty-six million, one hundred twelve thousand, sixty-one".