77061055 has 16 divisors (see below), whose sum is σ = 98801280. Its totient is φ = 57527712.

The previous prime is 77061053. The next prime is 77061067. The reversal of 77061055 is 55016077.

It is a cyclic number.

It is not a de Polignac number, because 77061055 - 2¹ = 77061053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77061053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 312 + ... + 12418.

It is an arithmetic number, because the mean of its divisors is an integer number (6175080).

Almost surely, 2^77061055 is an apocalyptic number.

77061055 is a deficient number, since it is larger than the sum of its proper divisors (21740225).

77061055 is a wasteful number, since it uses less digits than its factorization.

77061055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12198.

The product of its (nonzero) digits is 7350, while the sum is 31.

The square root of 77061055 is about 8778.4426295329. The cubic root of 77061055 is about 425.5445016359.

The spelling of 77061055 in words is "seventy-seven million, sixty-one thousand, fifty-five".