6601111562631 has 16 divisors (see below), whose sum is σ = 9264795719040. Its totient is φ = 4169088110880.

The previous prime is 6601111562623. The next prime is 6601111562657. The reversal of 6601111562631 is 1362651111066.

It is not a de Polignac number, because 6601111562631 - 2³ = 6601111562623 is a prime.

It is a super-2 number, since 2×6601111562631² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6601111562631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6601111562621) 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 15 ways as a sum of consecutive naturals, for example, 7511881 + ... + 8344493.

It is an arithmetic number, because the mean of its divisors is an integer number (579049732440).

Almost surely, 2^{6601111562631} is an apocalyptic number.

6601111562631 is a deficient number, since it is larger than the sum of its proper divisors (2663684156409).

6601111562631 is a wasteful number, since it uses less digits than its factorization.

6601111562631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971726.

The product of its (nonzero) digits is 38880, while the sum is 39.

Adding to 6601111562631 its reverse (1362651111066), we get a palindrome (7963762673697).

The spelling of 6601111562631 in words is "six trillion, six hundred one billion, one hundred eleven million, five hundred sixty-two thousand, six hundred thirty-one".