664628761726107 has 16 divisors (see below), whose sum is σ = 911721780291360. Its totient is φ = 430352884576512.

The previous prime is 664628761726103. The next prime is 664628761726109. The reversal of 664628761726107 is 701627167826466.

It is not a de Polignac number, because 664628761726107 - 2² = 664628761726103 is a prime.

It is not an unprimeable number, because it can be changed into a prime (664628761726103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5261489128 + ... + 5261615445.

It is an arithmetic number, because the mean of its divisors is an integer number (56982611268210).

Almost surely, 2^{664628761726107} is an apocalyptic number.

664628761726107 is a deficient number, since it is larger than the sum of its proper divisors (247093018565253).

664628761726107 is a wasteful number, since it uses less digits than its factorization.

664628761726107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10523105182.

The product of its (nonzero) digits is 341397504, while the sum is 69.

The spelling of 664628761726107 in words is "six hundred sixty-four trillion, six hundred twenty-eight billion, seven hundred sixty-one million, seven hundred twenty-six thousand, one hundred seven".