776668161 has 8 divisors (see below), whose sum is σ = 1035686304. Its totient is φ = 517714400.

The previous prime is 776668159. The next prime is 776668177. The reversal of 776668161 is 161866677.

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 776668161 - 2¹ = 776668159 is a prime.

It is a super-2 number, since 2×776668161² = 1206426864622243842, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 776668161.

It is not an unprimeable number, because it can be changed into a prime (776668121) 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, 38986 + ... + 55436.

It is an arithmetic number, because the mean of its divisors is an integer number (129460788).

Almost surely, 2^776668161 is an apocalyptic number.

It is an amenable number.

776668161 is a deficient number, since it is larger than the sum of its proper divisors (259018143).

776668161 is a wasteful number, since it uses less digits than its factorization.

776668161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32191.

The product of its digits is 508032, while the sum is 48.

The square root of 776668161 is about 27868.7667649647. The cubic root of 776668161 is about 919.2038484793.

The spelling of 776668161 in words is "seven hundred seventy-six million, six hundred sixty-eight thousand, one hundred sixty-one".