81262466 has 12 divisors (see below), whose sum is σ = 126244482. Its totient is φ = 39229344.

The previous prime is 81262463. The next prime is 81262477. The reversal of 81262466 is 66426218.

It can be written as a sum of positive squares in 3 ways, for example, as 63664441 + 17598025 = 7979^2 + 4195^2 .

It is not an unprimeable number, because it can be changed into a prime (81262463) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22475 + ... + 25838.

Almost surely, 2^81262466 is an apocalyptic number.

81262466 is a deficient number, since it is larger than the sum of its proper divisors (44982016).

81262466 is a wasteful number, since it uses less digits than its factorization.

81262466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48373 (or 48344 counting only the distinct ones).

The product of its digits is 27648, while the sum is 35.

The square root of 81262466 is about 9014.5696514032. The cubic root of 81262466 is about 433.1417023822.

The spelling of 81262466 in words is "eighty-one million, two hundred sixty-two thousand, four hundred sixty-six".