81676411 has 8 divisors (see below), whose sum is σ = 82260464. Its totient is φ = 81095040.

The previous prime is 81676409. The next prime is 81676423. The reversal of 81676411 is 11467618.

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

It is a cyclic number.

It is not a de Polignac number, because 81676411 - 2¹ = 81676409 is a prime.

It is a super-2 number, since 2×81676411² = 13342072227681842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81676451) 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, 142756 + ... + 143326.

It is an arithmetic number, because the mean of its divisors is an integer number (10282558).

Almost surely, 2^81676411 is an apocalyptic number.

81676411 is a deficient number, since it is larger than the sum of its proper divisors (584053).

81676411 is a wasteful number, since it uses less digits than its factorization.

81676411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1341.

The product of its digits is 8064, while the sum is 34.

The square root of 81676411 is about 9037.5002627939. The cubic root of 81676411 is about 433.8759210517.

The spelling of 81676411 in words is "eighty-one million, six hundred seventy-six thousand, four hundred eleven".