76765981 has 8 divisors (see below), whose sum is σ = 79748928. Its totient is φ = 73836000.

The previous prime is 76765967. The next prime is 76766077. The reversal of 76765981 is 18956767.

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 76765981 - 2¹³ = 76757789 is a prime.

It is a super-3 number, since 3×76765981³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76765921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10275 + ... + 16096.

It is an arithmetic number, because the mean of its divisors is an integer number (9968616).

Almost surely, 2^76765981 is an apocalyptic number.

76765981 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

76765981 is a deficient number, since it is larger than the sum of its proper divisors (2982947).

76765981 is a wasteful number, since it uses less digits than its factorization.

76765981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26483.

The product of its digits is 635040, while the sum is 49.

The square root of 76765981 is about 8761.6197703393. The cubic root of 76765981 is about 425.0006569771. Note that the first 3 decimals are identical.

The spelling of 76765981 in words is "seventy-six million, seven hundred sixty-five thousand, nine hundred eighty-one".