80446665 has 32 divisors (see below), whose sum is σ = 145918080. Its totient is φ = 37518336.

The previous prime is 80446661. The next prime is 80446673. The reversal of 80446665 is 56664408.

It is not a de Polignac number, because 80446665 - 2² = 80446661 is a prime.

It is a super-3 number, since 3×80446665³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (80446661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7152 + ... + 14561.

It is an arithmetic number, because the mean of its divisors is an integer number (4559940).

Almost surely, 2^80446665 is an apocalyptic number.

It is an amenable number.

80446665 is a deficient number, since it is larger than the sum of its proper divisors (65471415).

80446665 is a wasteful number, since it uses less digits than its factorization.

80446665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21753.

The product of its (nonzero) digits is 138240, while the sum is 39.

The square root of 80446665 is about 8969.2064866408. The cubic root of 80446665 is about 431.6873756275.

The spelling of 80446665 in words is "eighty million, four hundred forty-six thousand, six hundred sixty-five".