66201725140541 has 4 divisors (see below), whose sum is σ = 66202217711772. Its totient is φ = 66201232569312.

The previous prime is 66201725140511. The next prime is 66201725140597. The reversal of 66201725140541 is 14504152710266.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31801095448516 + 34400629692025 = 5639246^2 + 5865205^2 .

It is a cyclic number.

It is not a de Polignac number, because 66201725140541 - 2²² = 66201720946237 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66201725140492 and 66201725140501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66201725140511) 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, 246083960 + ... + 246352833.

It is an arithmetic number, because the mean of its divisors is an integer number (16550554427943).

Almost surely, 2^{66201725140541} is an apocalyptic number.

It is an amenable number.

66201725140541 is a deficient number, since it is larger than the sum of its proper divisors (492571231).

66201725140541 is a wasteful number, since it uses less digits than its factorization.

66201725140541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492571230.

The product of its (nonzero) digits is 403200, while the sum is 44.

The spelling of 66201725140541 in words is "sixty-six trillion, two hundred one billion, seven hundred twenty-five million, one hundred forty thousand, five hundred forty-one".