66570373543 has 2 divisors, whose sum is σ = 66570373544. Its totient is φ = 66570373542.

The previous prime is 66570373523. The next prime is 66570373547. The reversal of 66570373543 is 34537307566.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66570373543 - 2⁹ = 66570373031 is a prime.

It is a super-2 number, since 2×66570373543² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66570373547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33285186771 + 33285186772.

It is an arithmetic number, because the mean of its divisors is an integer number (33285186772).

Almost surely, 2^66570373543 is an apocalyptic number.

66570373543 is a deficient number, since it is larger than the sum of its proper divisors (1).

66570373543 is an equidigital number, since it uses as much as digits as its factorization.

66570373543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4762800, while the sum is 49.

The spelling of 66570373543 in words is "sixty-six billion, five hundred seventy million, three hundred seventy-three thousand, five hundred forty-three".