66608840241501 has 16 divisors (see below), whose sum is σ = 88926175962624. Its totient is φ = 44348711549184.

The previous prime is 66608840241499. The next prime is 66608840241521. The reversal of 66608840241501 is 10514204880666.

It is not a de Polignac number, because 66608840241501 - 2¹ = 66608840241499 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66608840241521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19742721 + ... + 22869033.

It is an arithmetic number, because the mean of its divisors is an integer number (5557885997664).

Almost surely, 2^{66608840241501} is an apocalyptic number.

It is an amenable number.

66608840241501 is a deficient number, since it is larger than the sum of its proper divisors (22317335721123).

66608840241501 is a wasteful number, since it uses less digits than its factorization.

66608840241501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3135460.

The product of its (nonzero) digits is 2211840, while the sum is 51.

The spelling of 66608840241501 in words is "sixty-six trillion, six hundred eight billion, eight hundred forty million, two hundred forty-one thousand, five hundred one".