55743777766 has 4 divisors (see below), whose sum is σ = 83615666652. Its totient is φ = 27871888882.

The previous prime is 55743777721. The next prime is 55743777769. The reversal of 55743777766 is 66777734755.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 55743777698 and 55743777707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55743777769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13935944440 + ... + 13935944443.

It is an arithmetic number, because the mean of its divisors is an integer number (20903916663).

Almost surely, 2^55743777766 is an apocalyptic number.

55743777766 is a deficient number, since it is larger than the sum of its proper divisors (27871888886).

55743777766 is a wasteful number, since it uses less digits than its factorization.

55743777766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27871888885.

The product of its digits is 181515600, while the sum is 64.

The spelling of 55743777766 in words is "fifty-five billion, seven hundred forty-three million, seven hundred seventy-seven thousand, seven hundred sixty-six".