2775557660667 has 32 divisors (see below), whose sum is σ = 4233873715200. Its totient is φ = 1600933324320.

The previous prime is 2775557660663. The next prime is 2775557660683. The reversal of 2775557660667 is 7660667555772.

It is not a de Polignac number, because 2775557660667 - 2² = 2775557660663 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is not an unprimeable number, because it can be changed into a prime (2775557660663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9037053 + ... + 9339134.

It is an arithmetic number, because the mean of its divisors is an integer number (132308553600).

Almost surely, 2^{2775557660667} is an apocalyptic number.

2775557660667 is a deficient number, since it is larger than the sum of its proper divisors (1458316054533).

2775557660667 is a wasteful number, since it uses less digits than its factorization.

2775557660667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18376423.

The product of its (nonzero) digits is 777924000, while the sum is 69.

The spelling of 2775557660667 in words is "two trillion, seven hundred seventy-five billion, five hundred fifty-seven million, six hundred sixty thousand, six hundred sixty-seven".