66002747 has 4 divisors (see below), whose sum is σ = 66293736. Its totient is φ = 65711760.

The previous prime is 66002707. The next prime is 66002759. The reversal of 66002747 is 74720066.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 66002747 - 2¹² = 65998651 is a prime.

It is a super-2 number, since 2×66002747² = 8712725223092018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66002707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145154 + ... + 145607.

It is an arithmetic number, because the mean of its divisors is an integer number (16573434).

Almost surely, 2^66002747 is an apocalyptic number.

66002747 is a deficient number, since it is larger than the sum of its proper divisors (290989).

66002747 is a wasteful number, since it uses less digits than its factorization.

66002747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290988.

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 66002747 is about 8124.2074690397. The cubic root of 66002747 is about 404.1296086947.

The spelling of 66002747 in words is "sixty-six million, two thousand, seven hundred forty-seven".