80766436987 has 2 divisors, whose sum is σ = 80766436988. Its totient is φ = 80766436986.

The previous prime is 80766436981. The next prime is 80766437023. The reversal of 80766436987 is 78963466708.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80766436987 - 2³⁵ = 46406698619 is a prime.

It is a super-3 number, since 3×80766436987³ (a number of 34 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (80766436981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40383218493 + 40383218494.

It is an arithmetic number, because the mean of its divisors is an integer number (40383218494).

Almost surely, 2^80766436987 is an apocalyptic number.

80766436987 is a deficient number, since it is larger than the sum of its proper divisors (1).

80766436987 is an equidigital number, since it uses as much as digits as its factorization.

80766436987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 73156608, while the sum is 64.

The spelling of 80766436987 in words is "eighty billion, seven hundred sixty-six million, four hundred thirty-six thousand, nine hundred eighty-seven".