6666502 has 4 divisors (see below), whose sum is σ = 9999756. Its totient is φ = 3333250.

The previous prime is 6666487. The next prime is 6666509. The reversal of 6666502 is 2056666.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2056666 = 2 ⋅1028333.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6666509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1666624 + ... + 1666627.

It is an arithmetic number, because the mean of its divisors is an integer number (2499939).

Almost surely, 2^6666502 is an apocalyptic number.

6666502 is a deficient number, since it is larger than the sum of its proper divisors (3333254).

6666502 is a wasteful number, since it uses less digits than its factorization.

6666502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3333253.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 6666502 is about 2581.9570097118. The cubic root of 6666502 is about 188.2056561908.

The spelling of 6666502 in words is "six million, six hundred sixty-six thousand, five hundred two".