6645011320506 has 16 divisors (see below), whose sum is σ = 14312332075104. Its totient is φ = 2044618867824.

The previous prime is 6645011320429. The next prime is 6645011320523. The reversal of 6645011320506 is 6050231105466.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42596226336 + ... + 42596226491.

It is an arithmetic number, because the mean of its divisors is an integer number (894520754694).

Almost surely, 2^{6645011320506} is an apocalyptic number.

6645011320506 is an abundant number, since it is smaller than the sum of its proper divisors (7667320754598).

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

6645011320506 is a wasteful number, since it uses less digits than its factorization.

6645011320506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85192452845.

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 6645011320506 in words is "six trillion, six hundred forty-five billion, eleven million, three hundred twenty thousand, five hundred six".