2777668889956 has 27 divisors (see below), whose sum is σ = 4883758999987. Its totient is φ = 1382339572280.

The previous prime is 2777668889927. The next prime is 2777668889959. The reversal of 2777668889956 is 6599888667772.

It is a happy number.

The square root of 2777668889956 is 1666634.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2777668889959) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 756650001 + ... + 756653671.

Almost surely, 2^{2777668889956} is an apocalyptic number.

2777668889956 is the 1666634-th square number.

It is an amenable number.

2777668889956 is a deficient number, since it is larger than the sum of its proper divisors (2106090110031).

2777668889956 is an frugal number, since it uses more digits than its factorization.

2777668889956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7800 (or 3900 counting only the distinct ones).

The product of its digits is 30725775360, while the sum is 88.

The spelling of 2777668889956 in words is "two trillion, seven hundred seventy-seven billion, six hundred sixty-eight million, eight hundred eighty-nine thousand, nine hundred fifty-six".