77755117 has 8 divisors (see below), whose sum is σ = 85777920. Its totient is φ = 69891360.

The previous prime is 77755091. The next prime is 77755121. The reversal of 77755117 is 71155777.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77755117 - 2²³ = 69366509 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77755117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77755217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38733 + ... + 40690.

It is an arithmetic number, because the mean of its divisors is an integer number (10722240).

Almost surely, 2^77755117 is an apocalyptic number.

It is an amenable number.

77755117 is a deficient number, since it is larger than the sum of its proper divisors (8022803).

77755117 is a wasteful number, since it uses less digits than its factorization.

77755117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79523.

The product of its digits is 60025, while the sum is 40.

The square root of 77755117 is about 8817.8861979502. The cubic root of 77755117 is about 426.8182620359.

The spelling of 77755117 in words is "seventy-seven million, seven hundred fifty-five thousand, one hundred seventeen".