76680781 has 8 divisors (see below), whose sum is σ = 81143424. Its totient is φ = 72312240.

The previous prime is 76680767. The next prime is 76680787. The reversal of 76680781 is 18708667.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 76680781 - 2⁵ = 76680749 is a prime.

It is a super-2 number, since 2×76680781² = 11759884349539922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76680787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21846 + ... + 25111.

It is an arithmetic number, because the mean of its divisors is an integer number (10142928).

Almost surely, 2^76680781 is an apocalyptic number.

76680781 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

76680781 is a deficient number, since it is larger than the sum of its proper divisors (4462643).

76680781 is a wasteful number, since it uses less digits than its factorization.

76680781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47051.

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 76680781 is about 8756.7563058475. The cubic root of 76680781 is about 424.8433674248.

The spelling of 76680781 in words is "seventy-six million, six hundred eighty thousand, seven hundred eighty-one".