84008661 has 16 divisors (see below), whose sum is σ = 122411520. Its totient is φ = 50823920.

The previous prime is 84008653. The next prime is 84008663. The reversal of 84008661 is 16680048.

It is a cyclic number.

It is not a de Polignac number, because 84008661 - 2³ = 84008653 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84008663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19816 + ... + 23678.

It is an arithmetic number, because the mean of its divisors is an integer number (7650720).

Almost surely, 2^84008661 is an apocalyptic number.

It is an amenable number.

84008661 is a deficient number, since it is larger than the sum of its proper divisors (38402859).

84008661 is a wasteful number, since it uses less digits than its factorization.

84008661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4536.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 84008661 is about 9165.6238740197. The cubic root of 84008661 is about 437.9669654617.

The spelling of 84008661 in words is "eighty-four million, eight thousand, six hundred sixty-one".