77406206071 has 4 divisors (see below), whose sum is σ = 77407182144. Its totient is φ = 77405230000.

The previous prime is 77406206069. The next prime is 77406206081. The reversal of 77406206071 is 17060260477.

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 77406206071 - 2¹ = 77406206069 is a prime.

It is a super-2 number, since 2×77406206071² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77406206081) 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, 357430 + ... + 531571.

It is an arithmetic number, because the mean of its divisors is an integer number (19351795536).

Almost surely, 2^77406206071 is an apocalyptic number.

77406206071 is a deficient number, since it is larger than the sum of its proper divisors (976073).

77406206071 is an equidigital number, since it uses as much as digits as its factorization.

77406206071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976072.

The product of its (nonzero) digits is 98784, while the sum is 40.

The spelling of 77406206071 in words is "seventy-seven billion, four hundred six million, two hundred six thousand, seventy-one".