66616237425301 has 4 divisors (see below), whose sum is σ = 66621879533952. Its totient is φ = 66610595316652.

The previous prime is 66616237425299. The next prime is 66616237425307. The reversal of 66616237425301 is 10352473261666.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66616237425301 - 2¹ = 66616237425299 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66616237425307) 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, 2821036615 + ... + 2821060228.

It is an arithmetic number, because the mean of its divisors is an integer number (16655469883488).

Almost surely, 2^{66616237425301} is an apocalyptic number.

It is an amenable number.

66616237425301 is a deficient number, since it is larger than the sum of its proper divisors (5642108651).

66616237425301 is a wasteful number, since it uses less digits than its factorization.

66616237425301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5642108650.

The product of its (nonzero) digits is 6531840, while the sum is 52.

The spelling of 66616237425301 in words is "sixty-six trillion, six hundred sixteen billion, two hundred thirty-seven million, four hundred twenty-five thousand, three hundred one".