66084951 has 4 divisors (see below), whose sum is σ = 88113272. Its totient is φ = 44056632.

The previous prime is 66084947. The next prime is 66084959. The reversal of 66084951 is 15948066.

66084951 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 66084951 - 2² = 66084947 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66084959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11014156 + ... + 11014161.

It is an arithmetic number, because the mean of its divisors is an integer number (22028318).

Almost surely, 2^66084951 is an apocalyptic number.

66084951 is a deficient number, since it is larger than the sum of its proper divisors (22028321).

66084951 is a wasteful number, since it uses less digits than its factorization.

66084951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22028320.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 66084951 is about 8129.2650959358. The cubic root of 66084951 is about 404.2973152904.

The spelling of 66084951 in words is "sixty-six million, eighty-four thousand, nine hundred fifty-one".