66462520442063 has 4 divisors (see below), whose sum is σ = 66462606916968. Its totient is φ = 66462433967160.

The previous prime is 66462520442047. The next prime is 66462520442069. The reversal of 66462520442063 is 36024402526466.

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 66462520442063 - 2⁴ = 66462520442047 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 (66462520442069) 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, 42074156 + ... + 43625217.

It is an arithmetic number, because the mean of its divisors is an integer number (16615651729242).

Almost surely, 2^{66462520442063} is an apocalyptic number.

66462520442063 is a deficient number, since it is larger than the sum of its proper divisors (86474905).

66462520442063 is an equidigital number, since it uses as much as digits as its factorization.

66462520442063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86474904.

The product of its (nonzero) digits is 9953280, while the sum is 50.

The spelling of 66462520442063 in words is "sixty-six trillion, four hundred sixty-two billion, five hundred twenty million, four hundred forty-two thousand, sixty-three".