77161266 has 144 divisors (see below), whose sum is σ = 219920064. Its totient is φ = 19035648.

The previous prime is 77161241. The next prime is 77161313. The reversal of 77161266 is 66216177.

It is a nude number because it is divisible by every one of its digits.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 77161266.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 473301 + ... + 473463.

Almost surely, 2^77161266 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77161266, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109960032).

77161266 is an abundant number, since it is smaller than the sum of its proper divisors (142758798).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77161266 is a wasteful number, since it uses less digits than its factorization.

77161266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225 (or 205 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 77161266 is about 8784.1485643174. The cubic root of 77161266 is about 425.7288825721.

The spelling of 77161266 in words is "seventy-seven million, one hundred sixty-one thousand, two hundred sixty-six".