66466751 has 4 divisors (see below), whose sum is σ = 71579592. Its totient is φ = 61353912.

The previous prime is 66466739. The next prime is 66466793. The reversal of 66466751 is 15766466.

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 66466751 - 2²² = 62272447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66466699 and 66466708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66466051) 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, 2556401 + ... + 2556426.

It is an arithmetic number, because the mean of its divisors is an integer number (17894898).

Almost surely, 2^66466751 is an apocalyptic number.

66466751 is a deficient number, since it is larger than the sum of its proper divisors (5112841).

66466751 is a wasteful number, since it uses less digits than its factorization.

66466751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5112840.

The product of its digits is 181440, while the sum is 41.

The square root of 66466751 is about 8152.7143332758. The cubic root of 66466751 is about 405.0744180681.

The spelling of 66466751 in words is "sixty-six million, four hundred sixty-six thousand, seven hundred fifty-one".