76776550 has 12 divisors (see below), whose sum is σ = 142804476. Its totient is φ = 30710600.

The previous prime is 76776547. The next prime is 76776551. The reversal of 76776550 is 5567767.

It is a junction number, because it is equal to n+sod(n) for n = 76776497 and 76776506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76776551) 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 5 ways as a sum of consecutive naturals, for example, 767716 + ... + 767815.

It is an arithmetic number, because the mean of its divisors is an integer number (11900373).

Almost surely, 2^76776550 is an apocalyptic number.

76776550 is a deficient number, since it is larger than the sum of its proper divisors (66027926).

76776550 is a wasteful number, since it uses less digits than its factorization.

76776550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1535543 (or 1535538 counting only the distinct ones).

The product of its (nonzero) digits is 308700, while the sum is 43.

The square root of 76776550 is about 8762.2228914814. Note that the first 3 decimals coincide. The cubic root of 76776550 is about 425.0201605200.

The spelling of 76776550 in words is "seventy-six million, seven hundred seventy-six thousand, five hundred fifty".