66680286 has 16 divisors (see below), whose sum is σ = 133449984. Its totient is φ = 22211864.

The previous prime is 66680279. The next prime is 66680293. The reversal of 66680286 is 68208666.

It is an interprime number because it is at equal distance from previous prime (66680279) and next prime (66680293).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 9685 + ... + 15071.

It is an arithmetic number, because the mean of its divisors is an integer number (8340624).

Almost surely, 2^66680286 is an apocalyptic number.

66680286 is an abundant number, since it is smaller than the sum of its proper divisors (66769698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66680286 is a wasteful number, since it uses less digits than its factorization.

66680286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7455.

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 66680286 is about 8165.7997771192. The cubic root of 66680286 is about 405.5077430036.

It can be divided in two parts, 66680 and 286, that added together give a palindrome (66966).

The spelling of 66680286 in words is "sixty-six million, six hundred eighty thousand, two hundred eighty-six".