80756066 has 4 divisors (see below), whose sum is σ = 121134102. Its totient is φ = 40378032.

The previous prime is 80756051. The next prime is 80756077. The reversal of 80756066 is 66065708.

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

It can be written as a sum of positive squares in only one way, i.e., 42055225 + 38700841 = 6485^2 + 6221^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20189015 + ... + 20189018.

Almost surely, 2^80756066 is an apocalyptic number.

80756066 is a deficient number, since it is larger than the sum of its proper divisors (40378036).

80756066 is a wasteful number, since it uses less digits than its factorization.

80756066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40378035.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 80756066 is about 8986.4378927359. The cubic root of 80756066 is about 432.2400964445.

It can be divided in two parts, 8075 and 6066, that added together give a palindrome (14141).

The spelling of 80756066 in words is "eighty million, seven hundred fifty-six thousand, sixty-six".