80766919 has 4 divisors (see below), whose sum is σ = 80840344. Its totient is φ = 80693496.

The previous prime is 80766913. The next prime is 80766937. The reversal of 80766919 is 91966708.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 80766919 - 2⁹ = 80766407 is a prime.

It is a super-2 number, since 2×80766919² = 13046590409505122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80766913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35037 + ... + 37270.

It is an arithmetic number, because the mean of its divisors is an integer number (20210086).

Almost surely, 2^80766919 is an apocalyptic number.

80766919 is a deficient number, since it is larger than the sum of its proper divisors (73425).

80766919 is a wasteful number, since it uses less digits than its factorization.

80766919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73424.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 80766919 is about 8987.0417268420. The cubic root of 80766919 is about 432.2594588357.

The spelling of 80766919 in words is "eighty million, seven hundred sixty-six thousand, nine hundred nineteen".