66246243 has 16 divisors (see below), whose sum is σ = 103676160. Its totient is φ = 36831456.

The previous prime is 66246239. The next prime is 66246253. The reversal of 66246243 is 34264266.

It is not a de Polignac number, because 66246243 - 2² = 66246239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66246223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41853 + ... + 43406.

It is an arithmetic number, because the mean of its divisors is an integer number (6479760).

Almost surely, 2^66246243 is an apocalyptic number.

66246243 is a deficient number, since it is larger than the sum of its proper divisors (37429917).

66246243 is a wasteful number, since it uses less digits than its factorization.

66246243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85306.

The product of its digits is 41472, while the sum is 33.

The square root of 66246243 is about 8139.1795041024. The cubic root of 66246243 is about 404.6259677359.

The spelling of 66246243 in words is "sixty-six million, two hundred forty-six thousand, two hundred forty-three".