66490599886 has 8 divisors (see below), whose sum is σ = 105602717520. Its totient is φ = 31289694048.

The previous prime is 66490599863. The next prime is 66490599893. The reversal of 66490599886 is 68899509466.

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, 977802906 + ... + 977802973.

It is an arithmetic number, because the mean of its divisors is an integer number (13200339690).

Almost surely, 2^66490599886 is an apocalyptic number.

66490599886 is a deficient number, since it is larger than the sum of its proper divisors (39112117634).

66490599886 is a wasteful number, since it uses less digits than its factorization.

66490599886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1955605898.

The product of its (nonzero) digits is 201553920, while the sum is 70.

The spelling of 66490599886 in words is "sixty-six billion, four hundred ninety million, five hundred ninety-nine thousand, eight hundred eighty-six".