80951966 has 4 divisors (see below), whose sum is σ = 121427952. Its totient is φ = 40475982.

The previous prime is 80951947. The next prime is 80951971. The reversal of 80951966 is 66915908.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20237990 + ... + 20237993.

It is an arithmetic number, because the mean of its divisors is an integer number (30356988).

Almost surely, 2^80951966 is an apocalyptic number.

80951966 is a deficient number, since it is larger than the sum of its proper divisors (40475986).

80951966 is a wasteful number, since it uses less digits than its factorization.

80951966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40475985.

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 80951966 is about 8997.3310487055. The cubic root of 80951966 is about 432.5893270004.

The spelling of 80951966 in words is "eighty million, nine hundred fifty-one thousand, nine hundred sixty-six".