81766795 has 16 divisors (see below), whose sum is σ = 108552960. Its totient is φ = 58626400.

The previous prime is 81766777. The next prime is 81766801. The reversal of 81766795 is 59766718.

It is not a de Polignac number, because 81766795 - 2⁷ = 81766667 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6565 + ... + 14374.

It is an arithmetic number, because the mean of its divisors is an integer number (6784560).

Almost surely, 2^81766795 is an apocalyptic number.

81766795 is a deficient number, since it is larger than the sum of its proper divisors (26786165).

81766795 is a wasteful number, since it uses less digits than its factorization.

81766795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21026.

The product of its digits is 635040, while the sum is 49.

The square root of 81766795 is about 9042.4993779375. The cubic root of 81766795 is about 434.0359059819.

The spelling of 81766795 in words is "eighty-one million, seven hundred sixty-six thousand, seven hundred ninety-five".