77780327 has 4 divisors (see below), whose sum is σ = 79882536. Its totient is φ = 75678120.

The previous prime is 77780317. The next prime is 77780341. The reversal of 77780327 is 72308777.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77780327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77780317) 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, 1051049 + ... + 1051122.

It is an arithmetic number, because the mean of its divisors is an integer number (19970634).

Almost surely, 2^77780327 is an apocalyptic number.

77780327 is a deficient number, since it is larger than the sum of its proper divisors (2102209).

77780327 is a wasteful number, since it uses less digits than its factorization.

77780327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2102208.

The product of its (nonzero) digits is 115248, while the sum is 41.

The square root of 77780327 is about 8819.3155630128. The cubic root of 77780327 is about 426.8643851556.

The spelling of 77780327 in words is "seventy-seven million, seven hundred eighty thousand, three hundred twenty-seven".