423777066567 has 4 divisors (see below), whose sum is σ = 565036088760. Its totient is φ = 282518044376.

The previous prime is 423777066539. The next prime is 423777066569. The reversal of 423777066567 is 765660777324.

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 423777066567 - 2²⁰ = 423776017991 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 423777066567.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423777066569) 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, 70629511092 + ... + 70629511097.

It is an arithmetic number, because the mean of its divisors is an integer number (141259022190).

Almost surely, 2^423777066567 is an apocalyptic number.

423777066567 is a deficient number, since it is larger than the sum of its proper divisors (141259022193).

423777066567 is a wasteful number, since it uses less digits than its factorization.

423777066567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141259022192.

The product of its (nonzero) digits is 62233920, while the sum is 60.

The spelling of 423777066567 in words is "four hundred twenty-three billion, seven hundred seventy-seven million, sixty-six thousand, five hundred sixty-seven".