766402161 has 16 divisors (see below), whose sum is σ = 1175589888. Its totient is φ = 435042000.

The previous prime is 766402093. The next prime is 766402193. The reversal of 766402161 is 161204667.

It is not a de Polignac number, because 766402161 - 2⁷ = 766402033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (766402061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117675 + ... + 124016.

It is an arithmetic number, because the mean of its divisors is an integer number (73474368).

Almost surely, 2^766402161 is an apocalyptic number.

It is an amenable number.

766402161 is a deficient number, since it is larger than the sum of its proper divisors (409187727).

766402161 is a wasteful number, since it uses less digits than its factorization.

766402161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241852.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 766402161 is about 27683.9693866324. The cubic root of 766402161 is about 915.1358596676.

The spelling of 766402161 in words is "seven hundred sixty-six million, four hundred two thousand, one hundred sixty-one".