80665243526 has 16 divisors (see below), whose sum is σ = 139292644896. Its totient is φ = 34318476096.

The previous prime is 80665243511. The next prime is 80665243541. The reversal of 80665243526 is 62534256608.

It is an interprime number because it is at equal distance from previous prime (80665243511) and next prime (80665243541).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 21026561 + ... + 21030396.

It is an arithmetic number, because the mean of its divisors is an integer number (8705790306).

Almost surely, 2^80665243526 is an apocalyptic number.

80665243526 is a deficient number, since it is larger than the sum of its proper divisors (58627401370).

80665243526 is a wasteful number, since it uses less digits than its factorization.

80665243526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42057103.

The product of its (nonzero) digits is 2073600, while the sum is 47.

The spelling of 80665243526 in words is "eighty billion, six hundred sixty-five million, two hundred forty-three thousand, five hundred twenty-six".