81066152 has 8 divisors (see below), whose sum is σ = 151999050. Its totient is φ = 40533072.

The previous prime is 81066151. The next prime is 81066169. The reversal of 81066152 is 25166018.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 53963716 + 27102436 = 7346^2 + 5206^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (81066151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5066627 + ... + 5066642.

Almost surely, 2^81066152 is an apocalyptic number.

It is an amenable number.

81066152 is a deficient number, since it is larger than the sum of its proper divisors (70932898).

81066152 is a wasteful number, since it uses less digits than its factorization.

81066152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10133275 (or 10133271 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 81066152 is about 9003.6743610595. The cubic root of 81066152 is about 432.7926263175.

It can be divided in two parts, 81066 and 152, that added together give a palindrome (81218).

The spelling of 81066152 in words is "eighty-one million, sixty-six thousand, one hundred fifty-two".