66046191 has 4 divisors (see below), whose sum is σ = 88061592. Its totient is φ = 44030792.

The previous prime is 66046181. The next prime is 66046217. The reversal of 66046191 is 19164066.

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 66046191 - 2⁷ = 66046063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66046181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11007696 + ... + 11007701.

It is an arithmetic number, because the mean of its divisors is an integer number (22015398).

Almost surely, 2^66046191 is an apocalyptic number.

66046191 is a deficient number, since it is larger than the sum of its proper divisors (22015401).

66046191 is a wasteful number, since it uses less digits than its factorization.

66046191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22015400.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 66046191 is about 8126.8807669364. The cubic root of 66046191 is about 404.2182573082.

The spelling of 66046191 in words is "sixty-six million, forty-six thousand, one hundred ninety-one".