2755668778 has 16 divisors (see below), whose sum is σ = 4383933696. Its totient is φ = 1296321840.

The previous prime is 2755668767. The next prime is 2755668791. The reversal of 2755668778 is 8778665572.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 488226 + ... + 493837.

It is an arithmetic number, because the mean of its divisors is an integer number (273995856).

Almost surely, 2^2755668778 is an apocalyptic number.

2755668778 is a deficient number, since it is larger than the sum of its proper divisors (1628264918).

2755668778 is a wasteful number, since it uses less digits than its factorization.

2755668778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982149.

The product of its digits is 39513600, while the sum is 61.

The square root of 2755668778 is about 52494.4642605294. The cubic root of 2755668778 is about 1401.9816796921.

The spelling of 2755668778 in words is "two billion, seven hundred fifty-five million, six hundred sixty-eight thousand, seven hundred seventy-eight".