66802023 has 16 divisors (see below), whose sum is σ = 99187200. Its totient is φ = 44435160.

The previous prime is 66802013. The next prime is 66802031. The reversal of 66802023 is 32020866.

It is not a de Polignac number, because 66802023 - 2⁴ = 66802007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66802013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10738 + ... + 15776.

It is an arithmetic number, because the mean of its divisors is an integer number (6199200).

Almost surely, 2^66802023 is an apocalyptic number.

66802023 is a deficient number, since it is larger than the sum of its proper divisors (32385177).

66802023 is a wasteful number, since it uses less digits than its factorization.

66802023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5539 (or 5533 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 66802023 is about 8173.2504549904. The cubic root of 66802023 is about 405.7543690442.

Adding to 66802023 its reverse (32020866), we get a palindrome (98822889).

The spelling of 66802023 in words is "sixty-six million, eight hundred two thousand, twenty-three".