6497166579920 has 40 divisors (see below), whose sum is σ = 15110367636480. Its totient is φ = 2598100122240.

The previous prime is 6497166579863. The next prime is 6497166579923. The reversal of 6497166579920 is 299756617946.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6497166579923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11703740 + ... + 12246299.

It is an arithmetic number, because the mean of its divisors is an integer number (377759190912).

Almost surely, 2^{6497166579920} is an apocalyptic number.

It is an amenable number.

6497166579920 is an abundant number, since it is smaller than the sum of its proper divisors (8613201056560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6497166579920 is a wasteful number, since it uses less digits than its factorization.

6497166579920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23953443 (or 23953437 counting only the distinct ones).

The product of its (nonzero) digits is 308629440, while the sum is 71.

The spelling of 6497166579920 in words is "six trillion, four hundred ninety-seven billion, one hundred sixty-six million, five hundred seventy-nine thousand, nine hundred twenty".