277396666768 has 20 divisors (see below), whose sum is σ = 578798814748. Its totient is φ = 128029230720.

The previous prime is 277396666759. The next prime is 277396666777. The reversal of 277396666768 is 867666693772.

It is an interprime number because it is at equal distance from previous prime (277396666759) and next prime (277396666777).

It can be written as a sum of positive squares in 2 ways, for example, as 186306183424 + 91090483344 = 431632^2 + 301812^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 277396666768.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 666818703 + ... + 666819118.

Almost surely, 2^277396666768 is an apocalyptic number.

It is an amenable number.

277396666768 is an abundant number, since it is smaller than the sum of its proper divisors (301402147980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

277396666768 is a wasteful number, since it uses less digits than its factorization.

277396666768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333637842 (or 1333637836 counting only the distinct ones).

The product of its digits is 1152216576, while the sum is 73.

The spelling of 277396666768 in words is "two hundred seventy-seven billion, three hundred ninety-six million, six hundred sixty-six thousand, seven hundred sixty-eight".