77777214 has 32 divisors (see below), whose sum is σ = 162860544. Its totient is φ = 24715680.

The previous prime is 77777197. The next prime is 77777221. The reversal of 77777214 is 41277777.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50719 + ... + 52229.

It is an arithmetic number, because the mean of its divisors is an integer number (5089392).

Almost surely, 2^77777214 is an apocalyptic number.

77777214 is an abundant number, since it is smaller than the sum of its proper divisors (85083330).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77777214 is a wasteful number, since it uses less digits than its factorization.

77777214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1912.

The product of its digits is 134456, while the sum is 42.

The square root of 77777214 is about 8819.1390736284. The cubic root of 77777214 is about 426.8586902856.

The spelling of 77777214 in words is "seventy-seven million, seven hundred seventy-seven thousand, two hundred fourteen".