6662216557207 has 4 divisors (see below), whose sum is σ = 6756050593296. Its totient is φ = 6568382521120.

The previous prime is 6662216557193. The next prime is 6662216557211. The reversal of 6662216557207 is 7027556122666.

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

It is a cyclic number.

It is not a de Polignac number, because 6662216557207 - 2²³ = 6662208168599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6662216557247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46917017938 + ... + 46917018079.

It is an arithmetic number, because the mean of its divisors is an integer number (1689012648324).

Almost surely, 2^{6662216557207} is an apocalyptic number.

6662216557207 is a deficient number, since it is larger than the sum of its proper divisors (93834036089).

6662216557207 is an equidigital number, since it uses as much as digits as its factorization.

6662216557207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93834036088.

The product of its (nonzero) digits is 12700800, while the sum is 55.

The spelling of 6662216557207 in words is "six trillion, six hundred sixty-two billion, two hundred sixteen million, five hundred fifty-seven thousand, two hundred seven".