66247264 has 24 divisors (see below), whose sum is σ = 131459328. Its totient is φ = 32860800.

The previous prime is 66247253. The next prime is 66247271. The reversal of 66247264 is 46274266.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4087 + ... + 12214.

It is an arithmetic number, because the mean of its divisors is an integer number (5477472).

Almost surely, 2^66247264 is an apocalyptic number.

It is an amenable number.

66247264 is a deficient number, since it is larger than the sum of its proper divisors (65212064).

66247264 is a wasteful number, since it uses less digits than its factorization.

66247264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16438 (or 16430 counting only the distinct ones).

The product of its digits is 96768, while the sum is 37.

The square root of 66247264 is about 8139.2422251706. The cubic root of 66247264 is about 404.6280464500.

The spelling of 66247264 in words is "sixty-six million, two hundred forty-seven thousand, two hundred sixty-four".