642706466567 has 8 divisors (see below), whose sum is σ = 704767149840. Its totient is φ = 581251253760.

The previous prime is 642706466561. The next prime is 642706466609. The reversal of 642706466567 is 765664607246.

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 642706466567 - 2³⁶ = 573986989831 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 (642706466561) 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, 151365392 + ... + 151369637.

It is an arithmetic number, because the mean of its divisors is an integer number (88095893730).

Almost surely, 2^642706466567 is an apocalyptic number.

642706466567 is a deficient number, since it is larger than the sum of its proper divisors (62060683273).

642706466567 is a wasteful number, since it uses less digits than its factorization.

642706466567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302735233.

The product of its (nonzero) digits is 60963840, while the sum is 59.

The spelling of 642706466567 in words is "six hundred forty-two billion, seven hundred six million, four hundred sixty-six thousand, five hundred sixty-seven".