66723339 has 4 divisors (see below), whose sum is σ = 88964456. Its totient is φ = 44482224.

The previous prime is 66723337. The next prime is 66723341. The reversal of 66723339 is 93332766.

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

It is an interprime number because it is at equal distance from previous prime (66723337) and next prime (66723341).

It is not a de Polignac number, because 66723339 - 2¹ = 66723337 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66723297 and 66723306.

It is not an unprimeable number, because it can be changed into a prime (66723337) 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, 11120554 + ... + 11120559.

It is an arithmetic number, because the mean of its divisors is an integer number (22241114).

Almost surely, 2^66723339 is an apocalyptic number.

66723339 is a deficient number, since it is larger than the sum of its proper divisors (22241117).

66723339 is a wasteful number, since it uses less digits than its factorization.

66723339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22241116.

The product of its digits is 122472, while the sum is 39.

The square root of 66723339 is about 8168.4355295246. The cubic root of 66723339 is about 405.5949980223.

It can be divided in two parts, 6672 and 3339, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 66723339 in words is "sixty-six million, seven hundred twenty-three thousand, three hundred thirty-nine".