66523401162501 has 48 divisors (see below), whose sum is σ = 96041361292800. Its totient is φ = 40938258078720.

The previous prime is 66523401162499. The next prime is 66523401162509. The reversal of 66523401162501 is 10526110432566.

It is not a de Polignac number, because 66523401162501 - 2¹ = 66523401162499 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66523401162509) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16655500 + ... + 20259626.

It is an arithmetic number, because the mean of its divisors is an integer number (2000861693600).

Almost surely, 2^{66523401162501} is an apocalyptic number.

66523401162501 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

66523401162501 is a deficient number, since it is larger than the sum of its proper divisors (29517960130299).

66523401162501 is a wasteful number, since it uses less digits than its factorization.

66523401162501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3604574 (or 3604557 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 66523401162501 in words is "sixty-six trillion, five hundred twenty-three billion, four hundred one million, one hundred sixty-two thousand, five hundred one".