81267006 has 16 divisors (see below), whose sum is σ = 165199248. Its totient is φ = 26644800.

The previous prime is 81266993. The next prime is 81267037. The reversal of 81267006 is 60076218.

It is a happy number.

It is a congruent number.

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, 110655 + ... + 111386.

It is an arithmetic number, because the mean of its divisors is an integer number (10324953).

Almost surely, 2^81267006 is an apocalyptic number.

81267006 is an abundant number, since it is smaller than the sum of its proper divisors (83932242).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81267006 is a wasteful number, since it uses less digits than its factorization.

81267006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222107.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 81267006 is about 9014.8214624584. The cubic root of 81267006 is about 433.1497685362.

The spelling of 81267006 in words is "eighty-one million, two hundred sixty-seven thousand, six".