761706681 has 4 divisors (see below), whose sum is σ = 1015608912. Its totient is φ = 507804452.

The previous prime is 761706677. The next prime is 761706683. The reversal of 761706681 is 186607167.

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: 186607167 = 3 ⋅62202389.

It is a cyclic number.

It is not a de Polignac number, because 761706681 - 2² = 761706677 is a prime.

It is a super-2 number, since 2×761706681² = 1160394135760071522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (761706683) 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, 126951111 + ... + 126951116.

It is an arithmetic number, because the mean of its divisors is an integer number (253902228).

Almost surely, 2^761706681 is an apocalyptic number.

It is an amenable number.

761706681 is a deficient number, since it is larger than the sum of its proper divisors (253902231).

761706681 is a wasteful number, since it uses less digits than its factorization.

761706681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253902230.

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 761706681 is about 27599.0340591840. The cubic root of 761706681 is about 913.2631233288.

The spelling of 761706681 in words is "seven hundred sixty-one million, seven hundred six thousand, six hundred eighty-one".