81676211 has 8 divisors (see below), whose sum is σ = 86583024. Its totient is φ = 76780800.

The previous prime is 81676181. The next prime is 81676229. The reversal of 81676211 is 11267618.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81676211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81676291) 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, 15236 + ... + 19886.

It is an arithmetic number, because the mean of its divisors is an integer number (10822878).

Almost surely, 2^81676211 is an apocalyptic number.

81676211 is a deficient number, since it is larger than the sum of its proper divisors (4906813).

81676211 is a wasteful number, since it uses less digits than its factorization.

81676211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5701.

The product of its digits is 4032, while the sum is 32.

The square root of 81676211 is about 9037.4891977805. The cubic root of 81676211 is about 433.8755669093.

The spelling of 81676211 in words is "eighty-one million, six hundred seventy-six thousand, two hundred eleven".