67632277553661 has 4 divisors (see below), whose sum is σ = 90176370071552. Its totient is φ = 45088185035772.

The previous prime is 67632277553609. The next prime is 67632277553693. The reversal of 67632277553661 is 16635577223676.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 67632277553661 - 2¹⁵ = 67632277520893 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 67632277553592 and 67632277553601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67632277553461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11272046258941 + ... + 11272046258946.

It is an arithmetic number, because the mean of its divisors is an integer number (22544092517888).

Almost surely, 2^{67632277553661} is an apocalyptic number.

It is an amenable number.

67632277553661 is a deficient number, since it is larger than the sum of its proper divisors (22544092517891).

67632277553661 is a wasteful number, since it uses less digits than its factorization.

67632277553661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22544092517890.

The product of its digits is 400075200, while the sum is 66.

The spelling of 67632277553661 in words is "sixty-seven trillion, six hundred thirty-two billion, two hundred seventy-seven million, five hundred fifty-three thousand, six hundred sixty-one".