66523026065430 has 128 divisors (see below), whose sum is σ = 180647717170176. Its totient is φ = 15535578816000.

The previous prime is 66523026065413. The next prime is 66523026065453. The reversal of 66523026065430 is 3456062032566.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 66523026065430.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 25738282 + ... + 28204701.

It is an arithmetic number, because the mean of its divisors is an integer number (1411310290392).

Almost surely, 2^{66523026065430} is an apocalyptic number.

66523026065430 is an abundant number, since it is smaller than the sum of its proper divisors (114124691104746).

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

66523026065430 is a wasteful number, since it uses less digits than its factorization.

66523026065430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53943142.

The product of its (nonzero) digits is 4665600, while the sum is 48.

Adding to 66523026065430 its reverse (3456062032566), we get a palindrome (69979088097996).

The spelling of 66523026065430 in words is "sixty-six trillion, five hundred twenty-three billion, twenty-six million, sixty-five thousand, four hundred thirty".