77764032406667 has 4 divisors (see below), whose sum is σ = 82338387254136. Its totient is φ = 73189677559200.

The previous prime is 77764032406661. The next prime is 77764032406733. The reversal of 77764032406667 is 76660423046777.

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 77764032406667 - 2⁴ = 77764032406651 is a prime.

It is a super-2 number, since 2×77764032406667² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77764032406661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2287177423709 + ... + 2287177423742.

It is an arithmetic number, because the mean of its divisors is an integer number (20584596813534).

Almost surely, 2^{77764032406667} is an apocalyptic number.

77764032406667 is a deficient number, since it is larger than the sum of its proper divisors (4574354847469).

77764032406667 is a wasteful number, since it uses less digits than its factorization.

77764032406667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4574354847468.

The product of its (nonzero) digits is 298722816, while the sum is 65.

The spelling of 77764032406667 in words is "seventy-seven trillion, seven hundred sixty-four billion, thirty-two million, four hundred six thousand, six hundred sixty-seven".