66682351 has 4 divisors (see below), whose sum is σ = 66750232. Its totient is φ = 66614472.

The previous prime is 66682309. The next prime is 66682373. The reversal of 66682351 is 15328666.

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 66682351 - 2¹⁷ = 66551279 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 66682351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66682051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32445 + ... + 34438.

It is an arithmetic number, because the mean of its divisors is an integer number (16687558).

Almost surely, 2^66682351 is an apocalyptic number.

66682351 is a deficient number, since it is larger than the sum of its proper divisors (67881).

66682351 is an equidigital number, since it uses as much as digits as its factorization.

66682351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67880.

The product of its digits is 51840, while the sum is 37.

The square root of 66682351 is about 8165.9262181335. The cubic root of 66682351 is about 405.5119289727.

The spelling of 66682351 in words is "sixty-six million, six hundred eighty-two thousand, three hundred fifty-one".