81027266 has 4 divisors (see below), whose sum is σ = 121540902. Its totient is φ = 40513632.

The previous prime is 81027251. The next prime is 81027277. The reversal of 81027266 is 66272018.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 75603025 + 5424241 = 8695^2 + 2329^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20256815 + ... + 20256818.

Almost surely, 2^81027266 is an apocalyptic number.

81027266 is a deficient number, since it is larger than the sum of its proper divisors (40513636).

81027266 is a wasteful number, since it uses less digits than its factorization.

81027266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40513635.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 81027266 is about 9001.5146503241. The cubic root of 81027266 is about 432.7234142591.

It can be divided in two parts, 8 and 1027266, that multiplied together give a palindrome (8218128).

The spelling of 81027266 in words is "eighty-one million, twenty-seven thousand, two hundred sixty-six".