76716981 has 12 divisors (see below), whose sum is σ = 120887520. Its totient is φ = 46495080.

The previous prime is 76716953. The next prime is 76717001. The reversal of 76716981 is 18961767.

It is not a de Polignac number, because 76716981 - 2⁵ = 76716949 is a prime.

It is a super-2 number, since 2×76716981² = 11770990347508722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76716181) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 387361 + ... + 387558.

It is an arithmetic number, because the mean of its divisors is an integer number (10073960).

Almost surely, 2^76716981 is an apocalyptic number.

It is an amenable number.

76716981 is a deficient number, since it is larger than the sum of its proper divisors (44170539).

76716981 is a wasteful number, since it uses less digits than its factorization.

76716981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774936 (or 774933 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 76716981 is about 8758.8230373721. The cubic root of 76716981 is about 424.9102112510.

The spelling of 76716981 in words is "seventy-six million, seven hundred sixteen thousand, nine hundred eighty-one".