77755005 has 16 divisors (see below), whose sum is σ = 138231360. Its totient is φ = 41469264.

The previous prime is 77754997. The next prime is 77755057. The reversal of 77755005 is 50055777.

It is not a de Polignac number, because 77755005 - 2³ = 77754997 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 287847 + ... + 288116.

It is an arithmetic number, because the mean of its divisors is an integer number (8639460).

Almost surely, 2^77755005 is an apocalyptic number.

It is an amenable number.

77755005 is a deficient number, since it is larger than the sum of its proper divisors (60476355).

77755005 is a wasteful number, since it uses less digits than its factorization.

77755005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575977 (or 575971 counting only the distinct ones).

The product of its (nonzero) digits is 42875, while the sum is 36.

The square root of 77755005 is about 8817.8798472195. The cubic root of 77755005 is about 426.8180571034.

The spelling of 77755005 in words is "seventy-seven million, seven hundred fifty-five thousand, five".