77705005 has 16 divisors (see below), whose sum is σ = 107568000. Its totient is φ = 52782912.

The previous prime is 77704997. The next prime is 77705009. The reversal of 77705005 is 50050777.

It is not a de Polignac number, because 77705005 - 2³ = 77704997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77705009) 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, 6630 + ... + 14119.

It is an arithmetic number, because the mean of its divisors is an integer number (6723000).

Almost surely, 2^77705005 is an apocalyptic number.

It is an amenable number.

77705005 is a deficient number, since it is larger than the sum of its proper divisors (29862995).

77705005 is a wasteful number, since it uses less digits than its factorization.

77705005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20868.

The product of its (nonzero) digits is 8575, while the sum is 31.

The square root of 77705005 is about 8815.0442426570. The cubic root of 77705005 is about 426.7265496869.

The spelling of 77705005 in words is "seventy-seven million, seven hundred five thousand, five".