626564060661 has 32 divisors (see below), whose sum is σ = 1051873560576. Its totient is φ = 322265160000.

The previous prime is 626564060659. The next prime is 626564060671. The reversal of 626564060661 is 166060465626.

It is a happy number.

It is not a de Polignac number, because 626564060661 - 2¹ = 626564060659 is a prime.

It is a super-2 number, since 2×626564060661² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 626564060661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (626564060611) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 13404385 + ... + 13451046.

It is an arithmetic number, because the mean of its divisors is an integer number (32871048768).

Almost surely, 2^626564060661 is an apocalyptic number.

It is an amenable number.

626564060661 is a deficient number, since it is larger than the sum of its proper divisors (425309499915).

626564060661 is a wasteful number, since it uses less digits than its factorization.

626564060661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26855553.

The product of its (nonzero) digits is 1866240, while the sum is 48.

The spelling of 626564060661 in words is "six hundred twenty-six billion, five hundred sixty-four million, sixty thousand, six hundred sixty-one".