76661487 has 12 divisors (see below), whose sum is σ = 126552400. Its totient is φ = 43806528.

The previous prime is 76661477. The next prime is 76661491. The reversal of 76661487 is 78416667.

It is not a de Polignac number, because 76661487 - 2¹¹ = 76659439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76661407) 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, 608362 + ... + 608487.

Almost surely, 2^76661487 is an apocalyptic number.

76661487 is a deficient number, since it is larger than the sum of its proper divisors (49890913).

76661487 is a wasteful number, since it uses less digits than its factorization.

76661487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216862 (or 1216859 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 76661487 is about 8755.6545729032. The cubic root of 76661487 is about 424.8077321786.

The spelling of 76661487 in words is "seventy-six million, six hundred sixty-one thousand, four hundred eighty-seven".