84405884661 has 12 divisors (see below), whose sum is σ = 139336698592. Its totient is φ = 48231934056.

The previous prime is 84405884609. The next prime is 84405884671. The reversal of 84405884661 is 16648850448.

It is a happy number.

It is not a de Polignac number, because 84405884661 - 2⁶ = 84405884597 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 84405884598 and 84405884607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84405884671) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 669887911 + ... + 669888036.

Almost surely, 2^84405884661 is an apocalyptic number.

It is an amenable number.

84405884661 is a deficient number, since it is larger than the sum of its proper divisors (54930813931).

84405884661 is a wasteful number, since it uses less digits than its factorization.

84405884661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1339775960 (or 1339775957 counting only the distinct ones).

The product of its (nonzero) digits is 5898240, while the sum is 54.

The spelling of 84405884661 in words is "eighty-four billion, four hundred five million, eight hundred eighty-four thousand, six hundred sixty-one".