64669366396646 has 24 divisors (see below), whose sum is σ = 108372225056592. Its totient is φ = 28913278561200.

The previous prime is 64669366396519. The next prime is 64669366396667.

64669366396646 is nontrivially palindromic in base 10.

It is a super-3 number, since 3×64669366396646³ (a number of 42 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2190385130 + ... + 2190414653.

It is an arithmetic number, because the mean of its divisors is an integer number (4515509377358).

Almost surely, 2^{64669366396646} is an apocalyptic number.

64669366396646 is a deficient number, since it is larger than the sum of its proper divisors (43702858659946).

64669366396646 is a wasteful number, since it uses less digits than its factorization.

64669366396646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4380799868 (or 4380799857 counting only the distinct ones).

The product of its digits is 19591041024, while the sum is 80.

The spelling of 64669366396646 in words is "sixty-four trillion, six hundred sixty-nine billion, three hundred sixty-six million, three hundred ninety-six thousand, six hundred forty-six".