6466158516646 has 4 divisors (see below), whose sum is σ = 9699237774972. Its totient is φ = 3233079258322.

The previous prime is 6466158516619. The next prime is 6466158516661.

6466158516646 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×6466158516646² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1616539629160 + ... + 1616539629163.

It is an arithmetic number, because the mean of its divisors is an integer number (2424809443743).

Almost surely, 2^{6466158516646} is an apocalyptic number.

6466158516646 is a deficient number, since it is larger than the sum of its proper divisors (3233079258326).

6466158516646 is a wasteful number, since it uses less digits than its factorization.

6466158516646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3233079258325.

The product of its digits is 149299200, while the sum is 64.

The spelling of 6466158516646 in words is "six trillion, four hundred sixty-six billion, one hundred fifty-eight million, five hundred sixteen thousand, six hundred forty-six".