64662443 has 2 divisors, whose sum is σ = 64662444. Its totient is φ = 64662442.

The previous prime is 64662439. The next prime is 64662449. The reversal of 64662443 is 34426646.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64662443 - 2² = 64662439 is a prime.

It is not a weakly prime, because it can be changed into another prime (64662449) 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 as a sum of consecutive naturals, namely, 32331221 + 32331222.

It is an arithmetic number, because the mean of its divisors is an integer number (32331222).

Almost surely, 2^64662443 is an apocalyptic number.

64662443 is a deficient number, since it is larger than the sum of its proper divisors (1).

64662443 is an equidigital number, since it uses as much as digits as its factorization.

64662443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 35.

The square root of 64662443 is about 8041.2961019975. The cubic root of 64662443 is about 401.3753551588.

The spelling of 64662443 in words is "sixty-four million, six hundred sixty-two thousand, four hundred forty-three".