66821000026 has 8 divisors (see below), whose sum is σ = 109343454624. Its totient is φ = 30373181820.

The previous prime is 66821000009. The next prime is 66821000027. The reversal of 66821000026 is 62000012866.

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

It is not an unprimeable number, because it can be changed into a prime (66821000027) 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, 1518659070 + ... + 1518659113.

It is an arithmetic number, because the mean of its divisors is an integer number (13667931828).

Almost surely, 2^66821000026 is an apocalyptic number.

66821000026 is a deficient number, since it is larger than the sum of its proper divisors (42522454598).

66821000026 is a wasteful number, since it uses less digits than its factorization.

66821000026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3037318196.

The product of its (nonzero) digits is 6912, while the sum is 31.

The spelling of 66821000026 in words is "sixty-six billion, eight hundred twenty-one million, twenty-six", and thus it is an aban number.