81258667 has 16 divisors (see below), whose sum is σ = 96373440. Its totient is φ = 67036032.

The previous prime is 81258659. The next prime is 81258703. The reversal of 81258667 is 76685218.

It is not a de Polignac number, because 81258667 - 2³ = 81258659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81258607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124113 + ... + 124765.

It is an arithmetic number, because the mean of its divisors is an integer number (6023340).

Almost surely, 2^81258667 is an apocalyptic number.

81258667 is a deficient number, since it is larger than the sum of its proper divisors (15114773).

81258667 is a wasteful number, since it uses less digits than its factorization.

81258667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1302.

The product of its digits is 161280, while the sum is 43.

The square root of 81258667 is about 9014.3589345000. The cubic root of 81258667 is about 433.1349525215.

It can be divided in two parts, 812 and 58667, that multiplied together give a square (47637604 = 6902²).

The spelling of 81258667 in words is "eighty-one million, two hundred fifty-eight thousand, six hundred sixty-seven".