77222005 has 16 divisors (see below), whose sum is σ = 106093440. Its totient is φ = 52857792.

The previous prime is 77221999. The next prime is 77222009. The reversal of 77222005 is 50022277.

It is a cyclic number.

It is not a de Polignac number, because 77222005 - 2⁷ = 77221877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77222009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22066 + ... + 25324.

It is an arithmetic number, because the mean of its divisors is an integer number (6630840).

Almost surely, 2^77222005 is an apocalyptic number.

It is an amenable number.

77222005 is a deficient number, since it is larger than the sum of its proper divisors (28871435).

77222005 is a wasteful number, since it uses less digits than its factorization.

77222005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3948.

The product of its (nonzero) digits is 1960, while the sum is 25.

The square root of 77222005 is about 8787.6051914045. The cubic root of 77222005 is about 425.8405602136.

The spelling of 77222005 in words is "seventy-seven million, two hundred twenty-two thousand, five".