77345661607 has 4 divisors (see below), whose sum is σ = 77359253400. Its totient is φ = 77332069816.

The previous prime is 77345661521. The next prime is 77345661637. The reversal of 77345661607 is 70616654377.

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 77345661607 - 2¹⁵ = 77345628839 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 (77345661637) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 6787357 + ... + 6798742.

It is an arithmetic number, because the mean of its divisors is an integer number (19339813350).

Almost surely, 2^77345661607 is an apocalyptic number.

77345661607 is a deficient number, since it is larger than the sum of its proper divisors (13591793).

77345661607 is a wasteful number, since it uses less digits than its factorization.

77345661607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13591792.

The product of its (nonzero) digits is 4445280, while the sum is 52.

The spelling of 77345661607 in words is "seventy-seven billion, three hundred forty-five million, six hundred sixty-one thousand, six hundred seven".