6662521422015 has 16 divisors (see below), whose sum is σ = 10660071196896. Its totient is φ = 3553332451200.

The previous prime is 6662521421989. The next prime is 6662521422107. The reversal of 6662521422015 is 5102241252666.

It is a happy number.

It is not a de Polignac number, because 6662521422015 - 2²⁴ = 6662504644799 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5200485 + ... + 6353745.

It is an arithmetic number, because the mean of its divisors is an integer number (666254449806).

Almost surely, 2^{6662521422015} is an apocalyptic number.

6662521422015 is a deficient number, since it is larger than the sum of its proper divisors (3997549774881).

6662521422015 is a wasteful number, since it uses less digits than its factorization.

6662521422015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1538410.

The product of its (nonzero) digits is 345600, while the sum is 42.

The spelling of 6662521422015 in words is "six trillion, six hundred sixty-two billion, five hundred twenty-one million, four hundred twenty-two thousand, fifteen".