67775165551 has 4 divisors (see below), whose sum is σ = 67776596712. Its totient is φ = 67773734392.

The previous prime is 67775165533. The next prime is 67775165581. The reversal of 67775165551 is 15556157776.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 67775165551 - 2³⁵ = 33415427183 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 67775165492 and 67775165501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67775165581) 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, 642025 + ... + 740098.

It is an arithmetic number, because the mean of its divisors is an integer number (16944149178).

Almost surely, 2^67775165551 is an apocalyptic number.

67775165551 is a deficient number, since it is larger than the sum of its proper divisors (1431161).

67775165551 is a wasteful number, since it uses less digits than its factorization.

67775165551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1431160.

The product of its digits is 7717500, while the sum is 55.

The spelling of 67775165551 in words is "sixty-seven billion, seven hundred seventy-five million, one hundred sixty-five thousand, five hundred fifty-one".