66019486646 has 8 divisors (see below), whose sum is σ = 99100942464. Its totient is φ = 32985839160.

The previous prime is 66019486639. The next prime is 66019486681. The reversal of 66019486646 is 64668491066.

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

It is a junction number, because it is equal to n+sod(n) for n = 66019486591 and 66019486600.

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, 11948630 + ... + 11954153.

It is an arithmetic number, because the mean of its divisors is an integer number (12387617808).

Almost surely, 2^66019486646 is an apocalyptic number.

66019486646 is a deficient number, since it is larger than the sum of its proper divisors (33081455818).

66019486646 is a wasteful number, since it uses less digits than its factorization.

66019486646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23904166.

The product of its (nonzero) digits is 8957952, while the sum is 56.

The spelling of 66019486646 in words is "sixty-six billion, nineteen million, four hundred eighty-six thousand, six hundred forty-six".