71773966 has 32 divisors (see below), whose sum is σ = 127277568. Its totient is φ = 29984640.

The previous prime is 71773937. The next prime is 71773967. The reversal of 71773966 is 66937717.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71773967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13851 + ... + 18313.

It is an arithmetic number, because the mean of its divisors is an integer number (3977424).

Almost surely, 2^71773966 is an apocalyptic number.

71773966 is a deficient number, since it is larger than the sum of its proper divisors (55503602).

71773966 is a wasteful number, since it uses less digits than its factorization.

71773966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4536.

The product of its digits is 333396, while the sum is 46.

The square root of 71773966 is about 8471.9517231863. The cubic root of 71773966 is about 415.5809659645.

The spelling of 71773966 in words is "seventy-one million, seven hundred seventy-three thousand, nine hundred sixty-six".