667161766 has 16 divisors (see below), whose sum is σ = 1009096704. Its totient is φ = 330804864.

The previous prime is 667161751. The next prime is 667161767.

It is a happy number.

667161766 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667161767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184411 + ... + 187993.

It is an arithmetic number, because the mean of its divisors is an integer number (63068544).

Almost surely, 2^667161766 is an apocalyptic number.

667161766 is a deficient number, since it is larger than the sum of its proper divisors (341934938).

667161766 is a wasteful number, since it uses less digits than its factorization.

667161766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4335.

The product of its digits is 381024, while the sum is 46.

The square root of 667161766 is about 25829.4747526929. The cubic root of 667161766 is about 873.7966657775.

The spelling of 667161766 in words is "six hundred sixty-seven million, one hundred sixty-one thousand, seven hundred sixty-six".