77663534 has 16 divisors (see below), whose sum is σ = 125674080. Its totient is φ = 35782560.

The previous prime is 77663533. The next prime is 77663569. The reversal of 77663534 is 43536677.

It is a junction number, because it is equal to n+sod(n) for n = 77663491 and 77663500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77663533) 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 7 ways as a sum of consecutive naturals, for example, 14927 + ... + 19445.

It is an arithmetic number, because the mean of its divisors is an integer number (7854630).

Almost surely, 2^77663534 is an apocalyptic number.

77663534 is a deficient number, since it is larger than the sum of its proper divisors (48010546).

77663534 is a wasteful number, since it uses less digits than its factorization.

77663534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5195.

The product of its digits is 317520, while the sum is 41.

The square root of 77663534 is about 8812.6916433063. The cubic root of 77663534 is about 426.6506218196.

The spelling of 77663534 in words is "seventy-seven million, six hundred sixty-three thousand, five hundred thirty-four".