6466206402664 has 8 divisors (see below), whose sum is σ = 12124137005010. Its totient is φ = 3233103201328.

The previous prime is 6466206402661. The next prime is 6466206402713. The reversal of 6466206402664 is 4662046026646.

It can be written as a sum of positive squares in only one way, i.e., 4973533340164 + 1492673062500 = 2230142^2 + 1221750^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (6466206402661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404137900159 + ... + 404137900174.

Almost surely, 2^{6466206402664} is an apocalyptic number.

It is an amenable number.

6466206402664 is a deficient number, since it is larger than the sum of its proper divisors (5657930602346).

6466206402664 is a wasteful number, since it uses less digits than its factorization.

6466206402664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808275800339 (or 808275800335 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 52.

The spelling of 6466206402664 in words is "six trillion, four hundred sixty-six billion, two hundred six million, four hundred two thousand, six hundred sixty-four".