66313664250421 has 8 divisors (see below), whose sum is σ = 78231788240384. Its totient is φ = 55006726106160.

The previous prime is 66313664250401. The next prime is 66313664250451. The reversal of 66313664250421 is 12405246631366.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66313664250421 - 2⁵ = 66313664250389 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 (66313664250401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152796461190 + ... + 152796461623.

It is an arithmetic number, because the mean of its divisors is an integer number (9778973530048).

Almost surely, 2^{66313664250421} is an apocalyptic number.

It is an amenable number.

66313664250421 is a deficient number, since it is larger than the sum of its proper divisors (11918123989963).

66313664250421 is a wasteful number, since it uses less digits than its factorization.

66313664250421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305592922851.

The product of its (nonzero) digits is 3732480, while the sum is 49.

The spelling of 66313664250421 in words is "sixty-six trillion, three hundred thirteen billion, six hundred sixty-four million, two hundred fifty thousand, four hundred twenty-one".