80961806 has 8 divisors (see below), whose sum is σ = 123501240. Its totient is φ = 39794728.

The previous prime is 80961761. The next prime is 80961833. The reversal of 80961806 is 60816908.

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

It is a self number, because there is not a number n which added to its sum of digits gives 80961806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 342941 + ... + 343176.

It is an arithmetic number, because the mean of its divisors is an integer number (15437655).

Almost surely, 2^80961806 is an apocalyptic number.

80961806 is a deficient number, since it is larger than the sum of its proper divisors (42539434).

80961806 is a wasteful number, since it uses less digits than its factorization.

80961806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686178.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 80961806 is about 8997.8778609181. The cubic root of 80961806 is about 432.6068538817.

The spelling of 80961806 in words is "eighty million, nine hundred sixty-one thousand, eight hundred six".