80667681 has 8 divisors (see below), whose sum is σ = 109320384. Its totient is φ = 52896720.

The previous prime is 80667667. The next prime is 80667683. The reversal of 80667681 is 18676608.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 80667681 - 2¹¹ = 80665633 is a prime.

It is a super-2 number, since 2×80667681² = 13014549515835522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (80667683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220221 + ... + 220586.

It is an arithmetic number, because the mean of its divisors is an integer number (13665048).

Almost surely, 2^80667681 is an apocalyptic number.

It is an amenable number.

80667681 is a deficient number, since it is larger than the sum of its proper divisors (28652703).

80667681 is a wasteful number, since it uses less digits than its factorization.

80667681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440871.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 80667681 is about 8981.5188581887. The cubic root of 80667681 is about 432.0823477707.

The spelling of 80667681 in words is "eighty million, six hundred sixty-seven thousand, six hundred eighty-one".