81260667 has 12 divisors (see below), whose sum is σ = 117636064. Its totient is φ = 54054000.

The previous prime is 81260659. The next prime is 81260671. The reversal of 81260667 is 76606218.

It is a happy number.

It is not a de Polignac number, because 81260667 - 2³ = 81260659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81260657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5584 + ... + 13917.

Almost surely, 2^81260667 is an apocalyptic number.

81260667 is a deficient number, since it is larger than the sum of its proper divisors (36375397).

81260667 is a wasteful number, since it uses less digits than its factorization.

81260667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19970 (or 19967 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 81260667 is about 9014.4698679401. The cubic root of 81260667 is about 433.1385060411.

The spelling of 81260667 in words is "eighty-one million, two hundred sixty thousand, six hundred sixty-seven".