66447337351 has 4 divisors (see below), whose sum is σ = 70356004272. Its totient is φ = 62538670432.

The previous prime is 66447337349. The next prime is 66447337379. The reversal of 66447337351 is 15373374466.

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

It is a cyclic number.

It is not a de Polignac number, because 66447337351 - 2¹ = 66447337349 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66447337295 and 66447337304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66447337321) 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, 1954333435 + ... + 1954333468.

It is an arithmetic number, because the mean of its divisors is an integer number (17589001068).

Almost surely, 2^66447337351 is an apocalyptic number.

66447337351 is a deficient number, since it is larger than the sum of its proper divisors (3908666921).

66447337351 is a wasteful number, since it uses less digits than its factorization.

66447337351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3908666920.

The product of its digits is 3810240, while the sum is 49.

The spelling of 66447337351 in words is "sixty-six billion, four hundred forty-seven million, three hundred thirty-seven thousand, three hundred fifty-one".