81372466 has 8 divisors (see below), whose sum is σ = 139495680. Its totient is φ = 34873908.

The previous prime is 81372457. The next prime is 81372481. The reversal of 81372466 is 66427318.

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

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 2906146 + ... + 2906173.

It is an arithmetic number, because the mean of its divisors is an integer number (17436960).

Almost surely, 2^81372466 is an apocalyptic number.

81372466 is a deficient number, since it is larger than the sum of its proper divisors (58123214).

81372466 is a wasteful number, since it uses less digits than its factorization.

81372466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5812328.

The product of its digits is 48384, while the sum is 37.

The square root of 81372466 is about 9020.6688222105. The cubic root of 81372466 is about 433.3370533540.

The spelling of 81372466 in words is "eighty-one million, three hundred seventy-two thousand, four hundred sixty-six".