6662721516498 has 32 divisors (see below), whose sum is σ = 14810243774400. Its totient is φ = 2220277778208.

The previous prime is 6662721516457. The next prime is 6662721516499. The reversal of 6662721516498 is 8946151272666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6662721516499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17290836 + ... + 17671967.

It is an arithmetic number, because the mean of its divisors is an integer number (462820117950).

Almost surely, 2^{6662721516498} is an apocalyptic number.

6662721516498 is an abundant number, since it is smaller than the sum of its proper divisors (8147522257902).

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

6662721516498 is a wasteful number, since it uses less digits than its factorization.

6662721516498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34966343 (or 34966337 counting only the distinct ones).

The product of its digits is 52254720, while the sum is 63.

The spelling of 6662721516498 in words is "six trillion, six hundred sixty-two billion, seven hundred twenty-one million, five hundred sixteen thousand, four hundred ninety-eight".