66498713 has 4 divisors (see below), whose sum is σ = 70410420. Its totient is φ = 62587008.

The previous prime is 66498709. The next prime is 66498743. The reversal of 66498713 is 31789466.

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

It can be written as a sum of positive squares in 2 ways, for example, as 17875984 + 48622729 = 4228^2 + 6973^2 .

It is a cyclic number.

It is not a de Polignac number, because 66498713 - 2² = 66498709 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66498743) 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, 1955828 + ... + 1955861.

It is an arithmetic number, because the mean of its divisors is an integer number (17602605).

Almost surely, 2^66498713 is an apocalyptic number.

It is an amenable number.

66498713 is a deficient number, since it is larger than the sum of its proper divisors (3911707).

66498713 is a wasteful number, since it uses less digits than its factorization.

66498713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3911706.

The product of its digits is 217728, while the sum is 44.

The square root of 66498713 is about 8154.6743037353. The cubic root of 66498713 is about 405.1393373128.

The spelling of 66498713 in words is "sixty-six million, four hundred ninety-eight thousand, seven hundred thirteen".