77440704667 has 4 divisors (see below), whose sum is σ = 77451246736. Its totient is φ = 77430162600.

The previous prime is 77440704661. The next prime is 77440704701. The reversal of 77440704667 is 76640704477.

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-77440704667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77440704661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5260008 + ... + 5274709.

It is an arithmetic number, because the mean of its divisors is an integer number (19362811684).

Almost surely, 2^77440704667 is an apocalyptic number.

77440704667 is a deficient number, since it is larger than the sum of its proper divisors (10542069).

77440704667 is a wasteful number, since it uses less digits than its factorization.

77440704667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10542068.

The product of its (nonzero) digits is 5531904, while the sum is 52.

The spelling of 77440704667 in words is "seventy-seven billion, four hundred forty million, seven hundred four thousand, six hundred sixty-seven".