81466502 has 16 divisors (see below), whose sum is σ = 132566112. Its totient is φ = 37323840.

The previous prime is 81466501. The next prime is 81466513. The reversal of 81466502 is 20566418.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81466501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7874 + ... + 14997.

It is an arithmetic number, because the mean of its divisors is an integer number (8285382).

Almost surely, 2^81466502 is an apocalyptic number.

81466502 is a deficient number, since it is larger than the sum of its proper divisors (51099610).

81466502 is a wasteful number, since it uses less digits than its factorization.

81466502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23023.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 81466502 is about 9025.8795693273. The cubic root of 81466502 is about 433.5039140391.

The spelling of 81466502 in words is "eighty-one million, four hundred sixty-six thousand, five hundred two".