7776481 has 4 divisors (see below), whose sum is σ = 7782192. Its totient is φ = 7770772.

The previous prime is 7776473. The next prime is 7776541. The reversal of 7776481 is 1846777.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 7776481 - 2³ = 7776473 is a prime.

It is a super-2 number, since 2×7776481² = 120947313486722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7776451) 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, 510 + ... + 3976.

It is an arithmetic number, because the mean of its divisors is an integer number (1945548).

Almost surely, 2^7776481 is an apocalyptic number.

It is an amenable number.

7776481 is a deficient number, since it is larger than the sum of its proper divisors (5711).

7776481 is a wasteful number, since it uses less digits than its factorization.

7776481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5710.

The product of its digits is 65856, while the sum is 40.

The square root of 7776481 is about 2788.6342535370. The cubic root of 7776481 is about 198.1197197955.

The spelling of 7776481 in words is "seven million, seven hundred seventy-six thousand, four hundred eighty-one".