64668522586646 has 16 divisors (see below), whose sum is σ = 108282177355968. Its totient is φ = 28711183389000.

The previous prime is 64668522586643. The next prime is 64668522586669.

64668522586646 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64668522586643) 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, 34179979280 + ... + 34179981171.

It is an arithmetic number, because the mean of its divisors is an integer number (6767636084748).

Almost surely, 2^{64668522586646} is an apocalyptic number.

64668522586646 is a deficient number, since it is larger than the sum of its proper divisors (43613654769322).

64668522586646 is a wasteful number, since it uses less digits than its factorization.

64668522586646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68359960507.

The product of its digits is 4777574400, while the sum is 74.

The spelling of 64668522586646 in words is "sixty-four trillion, six hundred sixty-eight billion, five hundred twenty-two million, five hundred eighty-six thousand, six hundred forty-six".