77720014 has 8 divisors (see below), whose sum is σ = 116888760. Its totient is φ = 38757096.

The previous prime is 77720011. The next prime is 77720021. The reversal of 77720014 is 41002777.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77720011) 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, 50509 + ... + 52024.

It is an arithmetic number, because the mean of its divisors is an integer number (14611095).

Almost surely, 2^77720014 is an apocalyptic number.

77720014 is a deficient number, since it is larger than the sum of its proper divisors (39168746).

77720014 is a wasteful number, since it uses less digits than its factorization.

77720014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102914.

The product of its (nonzero) digits is 2744, while the sum is 28.

The square root of 77720014 is about 8815.8955302340. The cubic root of 77720014 is about 426.7540225052.

The spelling of 77720014 in words is "seventy-seven million, seven hundred twenty thousand, fourteen".