84666663 has 6 divisors (see below), whose sum is σ = 122296304. Its totient is φ = 56444436.

The previous prime is 84666649. The next prime is 84666667. The reversal of 84666663 is 36666648.

It is not a de Polignac number, because 84666663 - 2¹⁰ = 84665639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84666667) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4703695 + ... + 4703712.

Almost surely, 2^84666663 is an apocalyptic number.

84666663 is a deficient number, since it is larger than the sum of its proper divisors (37629641).

84666663 is a wasteful number, since it uses less digits than its factorization.

84666663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9407413 (or 9407410 counting only the distinct ones).

The product of its digits is 746496, while the sum is 45.

The square root of 84666663 is about 9201.4489619842. The cubic root of 84666663 is about 439.1074589533.

It can be divided in two parts, 8466 and 6663, that added together give a square (15129 = 123²).

The spelling of 84666663 in words is "eighty-four million, six hundred sixty-six thousand, six hundred sixty-three".