84870661 has 8 divisors (see below), whose sum is σ = 85887360. Its totient is φ = 83857872.

The previous prime is 84870641. The next prime is 84870679. The reversal of 84870661 is 16607848.

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

It is a cyclic number.

It is not a de Polignac number, because 84870661 - 2⁵ = 84870629 is a prime.

It is a super-3 number, since 3×84870661³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84870641) 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, 75975 + ... + 77083.

It is an arithmetic number, because the mean of its divisors is an integer number (10735920).

Almost surely, 2^84870661 is an apocalyptic number.

It is an amenable number.

84870661 is a deficient number, since it is larger than the sum of its proper divisors (1016699).

84870661 is a wasteful number, since it uses less digits than its factorization.

84870661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1955.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 84870661 is about 9212.5273948032. The cubic root of 84870661 is about 439.4598416319.

The spelling of 84870661 in words is "eighty-four million, eight hundred seventy thousand, six hundred sixty-one".