80756005 has 12 divisors (see below), whose sum is σ = 106518636. Its totient is φ = 58731200.

The previous prime is 80755999. The next prime is 80756051. The reversal of 80756005 is 50065708.

It can be written as a sum of positive squares in 2 ways, for example, as 61685316 + 19070689 = 7854^2 + 4367^2 .

It is not a de Polignac number, because 80756005 - 2⁷ = 80755877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66136 + ... + 67345.

It is an arithmetic number, because the mean of its divisors is an integer number (8876553).

Almost surely, 2^80756005 is an apocalyptic number.

It is an amenable number.

80756005 is a deficient number, since it is larger than the sum of its proper divisors (25762631).

80756005 is a wasteful number, since it uses less digits than its factorization.

80756005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133508 (or 133497 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 80756005 is about 8986.4344987320. The cubic root of 80756005 is about 432.2399876120.

The spelling of 80756005 in words is "eighty million, seven hundred fifty-six thousand, five".