81466353 has 24 divisors (see below), whose sum is σ = 120572712. Its totient is φ = 52985088.

The previous prime is 81466339. The next prime is 81466367. The reversal of 81466353 is 35366418.

81466353 is a `hidden beast` number, since 8 + 14 + 6 + 635 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (81466339) and next prime (81466367).

It can be written as a sum of positive squares in 4 ways, for example, as 31169889 + 50296464 = 5583^2 + 7092^2 .

It is not a de Polignac number, because 81466353 - 2⁶ = 81466289 is a prime.

It is a super-2 number, since 2×81466353² = 13273533342241218, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (81466313) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 110775 + ... + 111507.

It is an arithmetic number, because the mean of its divisors is an integer number (5023863).

Almost surely, 2^81466353 is an apocalyptic number.

It is an amenable number.

81466353 is a deficient number, since it is larger than the sum of its proper divisors (39106359).

81466353 is a wasteful number, since it uses less digits than its factorization.

81466353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025 (or 1022 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 81466353 is about 9025.8713152803. The cubic root of 81466353 is about 433.5036497500.

The spelling of 81466353 in words is "eighty-one million, four hundred sixty-six thousand, three hundred fifty-three".