642334452111066 has 128 divisors (see below), whose sum is σ = 1509898399543296. Its totient is φ = 179598151572480.

The previous prime is 642334452111019. The next prime is 642334452111067. The reversal of 642334452111066 is 660111254433246.

It is not an unprimeable number, because it can be changed into a prime (642334452111067) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 38562425010 + ... + 38562441666.

It is an arithmetic number, because the mean of its divisors is an integer number (11796081246432).

Almost surely, 2^{642334452111066} is an apocalyptic number.

642334452111066 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

642334452111066 is an abundant number, since it is smaller than the sum of its proper divisors (867563947432230).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642334452111066 is a wasteful number, since it uses less digits than its factorization.

642334452111066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32956.

The product of its (nonzero) digits is 2488320, while the sum is 48.

The spelling of 642334452111066 in words is "six hundred forty-two trillion, three hundred thirty-four billion, four hundred fifty-two million, one hundred eleven thousand, sixty-six".