81676658 has 16 divisors (see below), whose sum is σ = 140273664. Its totient is φ = 34940160.

The previous prime is 81676627. The next prime is 81676667. The reversal of 81676658 is 85667618.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3023 + ... + 13133.

It is an arithmetic number, because the mean of its divisors is an integer number (8767104).

Almost surely, 2^81676658 is an apocalyptic number.

81676658 is a deficient number, since it is larger than the sum of its proper divisors (58597006).

81676658 is a wasteful number, since it uses less digits than its factorization.

81676658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10697.

The product of its digits is 483840, while the sum is 47.

The square root of 81676658 is about 9037.5139280667. The cubic root of 81676658 is about 433.8763584169.

The spelling of 81676658 in words is "eighty-one million, six hundred seventy-six thousand, six hundred fifty-eight".