66610278863 has 8 divisors (see below), whose sum is σ = 71748519936. Its totient is φ = 61658883000.

The previous prime is 66610278857. The next prime is 66610278887. The reversal of 66610278863 is 36887201666.

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

It is not a de Polignac number, because 66610278863 - 2¹⁴ = 66610262479 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 (66610278853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46710563 + ... + 46711988.

It is an arithmetic number, because the mean of its divisors is an integer number (8968564992).

Almost surely, 2^66610278863 is an apocalyptic number.

66610278863 is a deficient number, since it is larger than the sum of its proper divisors (5138241073).

66610278863 is a wasteful number, since it uses less digits than its factorization.

66610278863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93422605.

The product of its (nonzero) digits is 3483648, while the sum is 53.

The spelling of 66610278863 in words is "sixty-six billion, six hundred ten million, two hundred seventy-eight thousand, eight hundred sixty-three".