64676622667646 has 16 divisors (see below), whose sum is σ = 105947423835120. Its totient is φ = 29367089743680.

The previous prime is 64676622667627. The next prime is 64676622667693.

64676622667646 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1568734181 + ... + 1568775408.

It is an arithmetic number, because the mean of its divisors is an integer number (6621713989695).

Almost surely, 2^{64676622667646} is an apocalyptic number.

64676622667646 is a deficient number, since it is larger than the sum of its proper divisors (41270801167474).

64676622667646 is a wasteful number, since it uses less digits than its factorization.

64676622667646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3137510539.

The product of its digits is 5267275776, while the sum is 74.

The spelling of 64676622667646 in words is "sixty-four trillion, six hundred seventy-six billion, six hundred twenty-two million, six hundred sixty-seven thousand, six hundred forty-six".