776780401 has 8 divisors (see below), whose sum is σ = 817931520. Its totient is φ = 735656112.

The previous prime is 776780393. The next prime is 776780413. The reversal of 776780401 is 104087677.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 776780401 - 2³ = 776780393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (776780441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85011 + ... + 93703.

It is an arithmetic number, because the mean of its divisors is an integer number (102241440).

Almost surely, 2^776780401 is an apocalyptic number.

It is an amenable number.

776780401 is a deficient number, since it is larger than the sum of its proper divisors (41151119).

776780401 is a wasteful number, since it uses less digits than its factorization.

776780401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13415.

The product of its (nonzero) digits is 65856, while the sum is 40.

The square root of 776780401 is about 27870.7804160558. The cubic root of 776780401 is about 919.2481258492.

The spelling of 776780401 in words is "seven hundred seventy-six million, seven hundred eighty thousand, four hundred one".