66302823 has 4 divisors (see below), whose sum is σ = 88403768. Its totient is φ = 44201880.

The previous prime is 66302801. The next prime is 66302833. The reversal of 66302823 is 32820366.

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

It is not a de Polignac number, because 66302823 - 2¹⁰ = 66301799 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 (66302833) 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, 11050468 + ... + 11050473.

It is an arithmetic number, because the mean of its divisors is an integer number (22100942).

Almost surely, 2^66302823 is an apocalyptic number.

66302823 is a deficient number, since it is larger than the sum of its proper divisors (22100945).

66302823 is a wasteful number, since it uses less digits than its factorization.

66302823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22100944.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 66302823 is about 8142.6545425924. The cubic root of 66302823 is about 404.7411301037.

It can be divided in two parts, 6630 and 2823, that added together give a triangular number (9453 = T₁₃₇).

The spelling of 66302823 in words is "sixty-six million, three hundred two thousand, eight hundred twenty-three".