7778135380466 has 16 divisors (see below), whose sum is σ = 12753161805888. Its totient is φ = 3528487218000.

The previous prime is 7778135380451. The next prime is 7778135380493. The reversal of 7778135380466 is 6640835318777.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 351431885 + ... + 351454016.

It is an arithmetic number, because the mean of its divisors is an integer number (797072612868).

Almost surely, 2^{7778135380466} is an apocalyptic number.

7778135380466 is a deficient number, since it is larger than the sum of its proper divisors (4975026425422).

7778135380466 is a wasteful number, since it uses less digits than its factorization.

7778135380466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702886417.

The product of its (nonzero) digits is 142248960, while the sum is 65.

The spelling of 7778135380466 in words is "seven trillion, seven hundred seventy-eight billion, one hundred thirty-five million, three hundred eighty thousand, four hundred sixty-six".