66468643 has 8 divisors (see below), whose sum is σ = 69615648. Its totient is φ = 63343104.

The previous prime is 66468637. The next prime is 66468653. The reversal of 66468643 is 34686466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66468643 - 2⁹ = 66468131 is a prime.

It is a super-2 number, since 2×66468643² = 8836161004522898, which contains 22 as substring.

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 66468643.

It is not an unprimeable number, because it can be changed into a prime (66468653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1155 + ... + 11587.

It is an arithmetic number, because the mean of its divisors is an integer number (8701956).

Almost surely, 2^66468643 is an apocalyptic number.

66468643 is a deficient number, since it is larger than the sum of its proper divisors (3147005).

66468643 is a wasteful number, since it uses less digits than its factorization.

66468643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10733.

The product of its digits is 497664, while the sum is 43.

The square root of 66468643 is about 8152.8303674246. The cubic root of 66468643 is about 405.0782615613.

The spelling of 66468643 in words is "sixty-six million, four hundred sixty-eight thousand, six hundred forty-three".