117561266 has 4 divisors (see below), whose sum is σ = 176341902. Its totient is φ = 58780632.

The previous prime is 117561259. The next prime is 117561271. The reversal of 117561266 is 662165711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 662165711 = 8929 ⋅74159.

It can be written as a sum of positive squares in only one way, i.e., 66080641 + 51480625 = 8129^2 + 7175^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 29390315 + ... + 29390318.

Almost surely, 2^117561266 is an apocalyptic number.

117561266 is a deficient number, since it is larger than the sum of its proper divisors (58780636).

117561266 is an equidigital number, since it uses as much as digits as its factorization.

117561266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58780635.

The product of its digits is 15120, while the sum is 35.

The square root of 117561266 is about 10842.5673159082. The cubic root of 117561266 is about 489.8781676835.

The spelling of 117561266 in words is "one hundred seventeen million, five hundred sixty-one thousand, two hundred sixty-six".