66623039 has 16 divisors (see below), whose sum is σ = 78355200. Its totient is φ = 55460160.

The previous prime is 66623033. The next prime is 66623047. The reversal of 66623039 is 93032666.

It is not a de Polignac number, because 66623039 - 2⁸ = 66622783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66623033) 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, 62987 + ... + 64035.

It is an arithmetic number, because the mean of its divisors is an integer number (4897200).

Almost surely, 2^66623039 is an apocalyptic number.

66623039 is a deficient number, since it is larger than the sum of its proper divisors (11732161).

66623039 is a wasteful number, since it uses less digits than its factorization.

66623039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1310.

The product of its (nonzero) digits is 34992, while the sum is 35.

The square root of 66623039 is about 8162.2937339941. The cubic root of 66623039 is about 405.3916629763.

The spelling of 66623039 in words is "sixty-six million, six hundred twenty-three thousand, thirty-nine".