81006675 has 12 divisors (see below), whose sum is σ = 133931160. Its totient is φ = 43203520.

The previous prime is 81006661. The next prime is 81006677. The reversal of 81006675 is 57660018.

It is not a de Polignac number, because 81006675 - 2¹³ = 80998483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81006677) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 539970 + ... + 540119.

It is an arithmetic number, because the mean of its divisors is an integer number (11160930).

Almost surely, 2^81006675 is an apocalyptic number.

81006675 is a deficient number, since it is larger than the sum of its proper divisors (52924485).

81006675 is a wasteful number, since it uses less digits than its factorization.

81006675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080102 (or 1080097 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 81006675 is about 9000.3708256938. The cubic root of 81006675 is about 432.6867559706.

The spelling of 81006675 in words is "eighty-one million, six thousand, six hundred seventy-five".