66251343 has 4 divisors (see below), whose sum is σ = 88335128. Its totient is φ = 44167560.

The previous prime is 66251299. The next prime is 66251357. The reversal of 66251343 is 34315266.

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

It is not a de Polignac number, because 66251343 - 2¹⁶ = 66185807 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 66251343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66251243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11041888 + ... + 11041893.

It is an arithmetic number, because the mean of its divisors is an integer number (22083782).

Almost surely, 2^66251343 is an apocalyptic number.

66251343 is a deficient number, since it is larger than the sum of its proper divisors (22083785).

66251343 is a wasteful number, since it uses less digits than its factorization.

66251343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22083784.

The product of its digits is 12960, while the sum is 30.

The square root of 66251343 is about 8139.4927974659. The cubic root of 66251343 is about 404.6363509134.

The spelling of 66251343 in words is "sixty-six million, two hundred fifty-one thousand, three hundred forty-three".