77740111 has 4 divisors (see below), whose sum is σ = 79057800. Its totient is φ = 76422424.

The previous prime is 77740081. The next prime is 77740121. The reversal of 77740111 is 11104777.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 77740111 - 2⁷ = 77739983 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 77740111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77740121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 658756 + ... + 658873.

It is an arithmetic number, because the mean of its divisors is an integer number (19764450).

Almost surely, 2^77740111 is an apocalyptic number.

77740111 is a deficient number, since it is larger than the sum of its proper divisors (1317689).

77740111 is a wasteful number, since it uses less digits than its factorization.

77740111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317688.

The product of its (nonzero) digits is 1372, while the sum is 28.

The square root of 77740111 is about 8817.0352726980. The cubic root of 77740111 is about 426.7908029775.

Adding to 77740111 its reverse (11104777), we get a palindrome (88844888).

The spelling of 77740111 in words is "seventy-seven million, seven hundred forty thousand, one hundred eleven".