77039677777 has 8 divisors (see below), whose sum is σ = 83890756800. Its totient is φ = 70468234704.

The previous prime is 77039677763. The next prime is 77039677837. The reversal of 77039677777 is 77777693077.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 77039677777 - 2¹⁹ = 77039153489 is a prime.

It is a super-2 number, since 2×77039677777² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77039657777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69908413 + ... + 69909514.

It is an arithmetic number, because the mean of its divisors is an integer number (10486344600).

Almost surely, 2^77039677777 is an apocalyptic number.

It is an amenable number.

77039677777 is a deficient number, since it is larger than the sum of its proper divisors (6851079023).

77039677777 is a wasteful number, since it uses less digits than its factorization.

77039677777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139817975.

The product of its (nonzero) digits is 133413966, while the sum is 67.

The spelling of 77039677777 in words is "seventy-seven billion, thirty-nine million, six hundred seventy-seven thousand, seven hundred seventy-seven".