77336648 has 8 divisors (see below), whose sum is σ = 145006230. Its totient is φ = 38668320.

The previous prime is 77336647. The next prime is 77336653. The reversal of 77336648 is 84663377.

It can be written as a sum of positive squares in only one way, i.e., 48413764 + 28922884 = 6958^2 + 5378^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 77336599 and 77336608.

It is not an unprimeable number, because it can be changed into a prime (77336647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4833533 + ... + 4833548.

Almost surely, 2^77336648 is an apocalyptic number.

It is an amenable number.

77336648 is a deficient number, since it is larger than the sum of its proper divisors (67669582).

77336648 is a wasteful number, since it uses less digits than its factorization.

77336648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9667087 (or 9667083 counting only the distinct ones).

The product of its digits is 508032, while the sum is 44.

The square root of 77336648 is about 8794.1257666695. The cubic root of 77336648 is about 426.0511888645.

The spelling of 77336648 in words is "seventy-seven million, three hundred thirty-six thousand, six hundred forty-eight".