66256723 has 8 divisors (see below), whose sum is σ = 72090368. Its totient is φ = 60528384.

The previous prime is 66256711. The next prime is 66256727. The reversal of 66256723 is 32765266.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66256723 - 2²⁵ = 32702291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66256727) 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 7 ways as a sum of consecutive naturals, for example, 25011 + ... + 27532.

It is an arithmetic number, because the mean of its divisors is an integer number (9011296).

Almost surely, 2^66256723 is an apocalyptic number.

66256723 is a deficient number, since it is larger than the sum of its proper divisors (5833645).

66256723 is a wasteful number, since it uses less digits than its factorization.

66256723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52653.

The product of its digits is 90720, while the sum is 37.

The square root of 66256723 is about 8139.8232781799. The cubic root of 66256723 is about 404.6473035700.

The spelling of 66256723 in words is "sixty-six million, two hundred fifty-six thousand, seven hundred twenty-three".