81067796 has 6 divisors (see below), whose sum is σ = 141868650. Its totient is φ = 40533896.

The previous prime is 81067787. The next prime is 81067807. The reversal of 81067796 is 69776018.

It can be written as a sum of positive squares in only one way, i.e., 78074896 + 2992900 = 8836^2 + 1730^2 .

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, 10133471 + ... + 10133478.

It is an arithmetic number, because the mean of its divisors is an integer number (23644775).

Almost surely, 2^81067796 is an apocalyptic number.

It is an amenable number.

81067796 is a deficient number, since it is larger than the sum of its proper divisors (60800854).

81067796 is a wasteful number, since it uses less digits than its factorization.

81067796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20266953 (or 20266951 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 81067796 is about 9003.7656566572. The cubic root of 81067796 is about 432.7955519375.

The spelling of 81067796 in words is "eighty-one million, sixty-seven thousand, seven hundred ninety-six".