66302687 has 4 divisors (see below), whose sum is σ = 72330216. Its totient is φ = 60275160.

The previous prime is 66302681. The next prime is 66302773. The reversal of 66302687 is 78620366.

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

It is not a de Polignac number, because 66302687 - 2¹⁸ = 66040543 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66302687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66302681) 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, 3013748 + ... + 3013769.

It is an arithmetic number, because the mean of its divisors is an integer number (18082554).

Almost surely, 2^66302687 is an apocalyptic number.

66302687 is a deficient number, since it is larger than the sum of its proper divisors (6027529).

66302687 is a wasteful number, since it uses less digits than its factorization.

66302687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6027528.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 66302687 is about 8142.6461915031. The cubic root of 66302687 is about 404.7408533693.

The spelling of 66302687 in words is "sixty-six million, three hundred two thousand, six hundred eighty-seven".