66562590633541 has 4 divisors (see below), whose sum is σ = 66635656046784. Its totient is φ = 66489525220300.

The previous prime is 66562590633533. The next prime is 66562590633551. The reversal of 66562590633541 is 14533609526566.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66562590633541 - 2³ = 66562590633533 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66562590633541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66562590633551) 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, 36532705255 + ... + 36532707076.

It is an arithmetic number, because the mean of its divisors is an integer number (16658914011696).

Almost surely, 2^{66562590633541} is an apocalyptic number.

It is an amenable number.

66562590633541 is a deficient number, since it is larger than the sum of its proper divisors (73065413243).

66562590633541 is an equidigital number, since it uses as much as digits as its factorization.

66562590633541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73065413242.

The product of its (nonzero) digits is 104976000, while the sum is 61.

The spelling of 66562590633541 in words is "sixty-six trillion, five hundred sixty-two billion, five hundred ninety million, six hundred thirty-three thousand, five hundred forty-one".