66211634494 has 8 divisors (see below), whose sum is σ = 99319490928. Its totient is φ = 33105137520.

The previous prime is 66211634471. The next prime is 66211634551. The reversal of 66211634494 is 49443611266.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207847 + ... + 419074.

It is an arithmetic number, because the mean of its divisors is an integer number (12414936366).

Almost surely, 2^66211634494 is an apocalyptic number.

66211634494 is a deficient number, since it is larger than the sum of its proper divisors (33107856434).

66211634494 is a wasteful number, since it uses less digits than its factorization.

66211634494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679730.

The product of its digits is 746496, while the sum is 46.

The spelling of 66211634494 in words is "sixty-six billion, two hundred eleven million, six hundred thirty-four thousand, four hundred ninety-four".