66002643 has 24 divisors (see below), whose sum is σ = 109667168. Its totient is φ = 37469952.

The previous prime is 66002641. The next prime is 66002659. The reversal of 66002643 is 34620066.

It is not a de Polignac number, because 66002643 - 2¹ = 66002641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66002641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6555 + ... + 13227.

Almost surely, 2^66002643 is an apocalyptic number.

66002643 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

66002643 is a deficient number, since it is larger than the sum of its proper divisors (43664525).

66002643 is a wasteful number, since it uses less digits than its factorization.

66002643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6843 (or 6840 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 66002643 is about 8124.2010684128. The cubic root of 66002643 is about 404.1293964333.

The spelling of 66002643 in words is "sixty-six million, two thousand, six hundred forty-three".