7766081 has 4 divisors (see below), whose sum is σ = 7817664. Its totient is φ = 7714500.

The previous prime is 7766071. The next prime is 7766107. The reversal of 7766081 is 1806677.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1806677 = 73 ⋅24749.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7766081 is a prime.

It is a super-2 number, since 2×7766081² = 120624028197122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7766021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25565 + ... + 25866.

It is an arithmetic number, because the mean of its divisors is an integer number (1954416).

Almost surely, 2^7766081 is an apocalyptic number.

It is an amenable number.

7766081 is a deficient number, since it is larger than the sum of its proper divisors (51583).

7766081 is a wasteful number, since it uses less digits than its factorization.

7766081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51582.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 7766081 is about 2786.7689175818. The cubic root of 7766081 is about 198.0313608796.

The spelling of 7766081 in words is "seven million, seven hundred sixty-six thousand, eighty-one".