66642367367 has 4 divisors (see below), whose sum is σ = 66668493936. Its totient is φ = 66616240800.

The previous prime is 66642367307. The next prime is 66642367423. The reversal of 66642367367 is 76376324666.

66642367367 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76376324666 = 2 ⋅38188162333.

It is a cyclic number.

It is not a de Polignac number, because 66642367367 - 2²⁴ = 66625590151 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 (66642367307) 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, 13059458 + ... + 13064559.

It is an arithmetic number, because the mean of its divisors is an integer number (16667123484).

Almost surely, 2^66642367367 is an apocalyptic number.

66642367367 is a deficient number, since it is larger than the sum of its proper divisors (26126569).

66642367367 is a wasteful number, since it uses less digits than its factorization.

66642367367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26126568.

The product of its digits is 27433728, while the sum is 56.

The spelling of 66642367367 in words is "sixty-six billion, six hundred forty-two million, three hundred sixty-seven thousand, three hundred sixty-seven".