64606660646 has 8 divisors (see below), whose sum is σ = 105719990184. Its totient is φ = 29366663920.

The previous prime is 64606660561. The next prime is 64606660687.

64606660646 is nontrivially palindromic in base 10.

64606660646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 64606660594 and 64606660603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1468333175 + ... + 1468333218.

It is an arithmetic number, because the mean of its divisors is an integer number (13214998773).

Almost surely, 2^64606660646 is an apocalyptic number.

64606660646 is a deficient number, since it is larger than the sum of its proper divisors (41113329538).

64606660646 is a wasteful number, since it uses less digits than its factorization.

64606660646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2936666406.

The product of its (nonzero) digits is 4478976, while the sum is 50.

The spelling of 64606660646 in words is "sixty-four billion, six hundred six million, six hundred sixty thousand, six hundred forty-six".