777776001 has 16 divisors (see below), whose sum is σ = 1121121600. Its totient is φ = 477949248.

The previous prime is 777775997. The next prime is 777776011. The reversal of 777776001 is 100677777.

It is not a de Polignac number, because 777776001 - 2² = 777775997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (777776011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182286 + ... + 186503.

It is an arithmetic number, because the mean of its divisors is an integer number (70070100).

Almost surely, 2^777776001 is an apocalyptic number.

It is an amenable number.

777776001 is a deficient number, since it is larger than the sum of its proper divisors (343345599).

777776001 is a wasteful number, since it uses less digits than its factorization.

777776001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368848.

The product of its (nonzero) digits is 100842, while the sum is 42.

The square root of 777776001 is about 27888.6356962832. The cubic root of 777776001 is about 919.6406918415.

The spelling of 777776001 in words is "seven hundred seventy-seven million, seven hundred seventy-six thousand, one".