66599245 has 8 divisors (see below), whose sum is σ = 80027640. Its totient is φ = 53207040.

The previous prime is 66599231. The next prime is 66599249. The reversal of 66599245 is 54299566.

It can be written as a sum of positive squares in 4 ways, for example, as 1522756 + 65076489 = 1234^2 + 8067^2 .

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

It is not a de Polignac number, because 66599245 - 2⁵ = 66599213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66599195 and 66599204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66599249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4816 + ... + 12505.

It is an arithmetic number, because the mean of its divisors is an integer number (10003455).

Almost surely, 2^66599245 is an apocalyptic number.

It is an amenable number.

66599245 is a deficient number, since it is larger than the sum of its proper divisors (13428395).

66599245 is a wasteful number, since it uses less digits than its factorization.

66599245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18095.

The product of its digits is 583200, while the sum is 46.

The square root of 66599245 is about 8160.8360478569. The cubic root of 66599245 is about 405.3433962009.

The spelling of 66599245 in words is "sixty-six million, five hundred ninety-nine thousand, two hundred forty-five".