67775775545 has 4 divisors (see below), whose sum is σ = 81330930660. Its totient is φ = 54220620432.

The previous prime is 67775775533. The next prime is 67775775563. The reversal of 67775775545 is 54557757776.

It is a happy number.

67775775545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 31322274361 + 36453501184 = 176981^2 + 190928^2 .

It is a cyclic number.

It is not a de Polignac number, because 67775775545 - 2¹² = 67775771449 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6777577550 + ... + 6777577559.

It is an arithmetic number, because the mean of its divisors is an integer number (20332732665).

Almost surely, 2^67775775545 is an apocalyptic number.

It is an amenable number.

67775775545 is a deficient number, since it is larger than the sum of its proper divisors (13555155115).

67775775545 is a wasteful number, since it uses less digits than its factorization.

67775775545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13555155114.

The product of its digits is 252105000, while the sum is 65.

The spelling of 67775775545 in words is "sixty-seven billion, seven hundred seventy-five million, seven hundred seventy-five thousand, five hundred forty-five".