761676781 has 4 divisors (see below), whose sum is σ = 761745600. Its totient is φ = 761607964.

The previous prime is 761676761. The next prime is 761676787. The reversal of 761676781 is 187676167.

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 761676781 - 2²⁹ = 224805869 is a prime.

It is a super-2 number, since 2×761676781² = 1160303037429043922, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (761676787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13621 + ... + 41338.

It is an arithmetic number, because the mean of its divisors is an integer number (190436400).

Almost surely, 2^761676781 is an apocalyptic number.

It is an amenable number.

761676781 is a deficient number, since it is larger than the sum of its proper divisors (68819).

761676781 is a wasteful number, since it uses less digits than its factorization.

761676781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68818.

The product of its digits is 592704, while the sum is 49.

The square root of 761676781 is about 27598.4923682436. The cubic root of 761676781 is about 913.2511734425.

The spelling of 761676781 in words is "seven hundred sixty-one million, six hundred seventy-six thousand, seven hundred eighty-one".