84170661 has 8 divisors (see below), whose sum is σ = 112297440. Its totient is φ = 56078832.

The previous prime is 84170641. The next prime is 84170699. The reversal of 84170661 is 16607148.

It is a happy number.

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

It is not a de Polignac number, because 84170661 - 2¹⁷ = 84039589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84170641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2475 + ... + 13208.

It is an arithmetic number, because the mean of its divisors is an integer number (14037180).

Almost surely, 2^84170661 is an apocalyptic number.

It is an amenable number.

84170661 is a deficient number, since it is larger than the sum of its proper divisors (28126779).

84170661 is a wasteful number, since it uses less digits than its factorization.

84170661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17475.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 84170661 is about 9174.4569866559. The cubic root of 84170661 is about 438.2483058613.

The spelling of 84170661 in words is "eighty-four million, one hundred seventy thousand, six hundred sixty-one".