66229713 has 36 divisors (see below), whose sum is σ = 106983604. Its totient is φ = 39441600.

The previous prime is 66229711. The next prime is 66229717. The reversal of 66229713 is 31792266.

It can be written as a sum of positive squares in 2 ways, for example, as 26501904 + 39727809 = 5148^2 + 6303^2 .

It is not a de Polignac number, because 66229713 - 2¹ = 66229711 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66229711) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 65931 + ... + 66927.

Almost surely, 2^66229713 is an apocalyptic number.

It is an amenable number.

66229713 is a deficient number, since it is larger than the sum of its proper divisors (40753891).

66229713 is a wasteful number, since it uses less digits than its factorization.

66229713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086 (or 1072 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 66229713 is about 8138.1639821277. The cubic root of 66229713 is about 404.5923103624.

The spelling of 66229713 in words is "sixty-six million, two hundred twenty-nine thousand, seven hundred thirteen".