81166762 has 8 divisors (see below), whose sum is σ = 121834656. Its totient is φ = 40555212.

The previous prime is 81166759. The next prime is 81166763. The reversal of 81166762 is 26766118.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×81166762³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (81166763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10278 + ... + 16369.

It is an arithmetic number, because the mean of its divisors is an integer number (15229332).

Almost surely, 2^81166762 is an apocalyptic number.

81166762 is a deficient number, since it is larger than the sum of its proper divisors (40667894).

81166762 is a wasteful number, since it uses less digits than its factorization.

81166762 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28172.

The product of its digits is 24192, while the sum is 37.

The square root of 81166762 is about 9009.2597920140. The cubic root of 81166762 is about 432.9715964706.

It can be divided in two parts, 8116 and 6762, that added together give a triangular number (14878 = T₁₇₂).

The spelling of 81166762 in words is "eighty-one million, one hundred sixty-six thousand, seven hundred sixty-two".