76728663 has 12 divisors (see below), whose sum is σ = 120905928. Its totient is φ = 46502160.

The previous prime is 76728661. The next prime is 76728677. The reversal of 76728663 is 36682767.

It is not a de Polignac number, because 76728663 - 2¹ = 76728661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76728661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 387420 + ... + 387617.

It is an arithmetic number, because the mean of its divisors is an integer number (10075494).

Almost surely, 2^76728663 is an apocalyptic number.

76728663 is a deficient number, since it is larger than the sum of its proper divisors (44177265).

76728663 is a wasteful number, since it uses less digits than its factorization.

76728663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775054 (or 775051 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

The square root of 76728663 is about 8759.4898824075. The cubic root of 76728663 is about 424.9317777460.

The spelling of 76728663 in words is "seventy-six million, seven hundred twenty-eight thousand, six hundred sixty-three".