66246437 has 2 divisors, whose sum is σ = 66246438. Its totient is φ = 66246436.

The previous prime is 66246431. The next prime is 66246457. The reversal of 66246437 is 73464266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65383396 + 863041 = 8086^2 + 929^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66246437 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66246437.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66246431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33123218 + 33123219.

It is an arithmetic number, because the mean of its divisors is an integer number (33123219).

Almost surely, 2^66246437 is an apocalyptic number.

It is an amenable number.

66246437 is a deficient number, since it is larger than the sum of its proper divisors (1).

66246437 is an equidigital number, since it uses as much as digits as its factorization.

66246437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 38.

The square root of 66246437 is about 8139.1914217568. The cubic root of 66246437 is about 404.6263627136.

The spelling of 66246437 in words is "sixty-six million, two hundred forty-six thousand, four hundred thirty-seven".