4891566 has 8 divisors (see below), whose sum is σ = 9783144. Its totient is φ = 1630520.

The previous prime is 4891559. The next prime is 4891567. The reversal of 4891566 is 6651984.

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

4891566 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4891567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 407625 + ... + 407636.

It is an arithmetic number, because the mean of its divisors is an integer number (1222893).

Almost surely, 2^4891566 is an apocalyptic number.

4891566 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4891566 is a wasteful number, since it uses less digits than its factorization.

4891566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815266.

The product of its digits is 51840, while the sum is 39.

The square root of 4891566 is about 2211.6884952452. The cubic root of 4891566 is about 169.7524193093.

The spelling of 4891566 in words is "four million, eight hundred ninety-one thousand, five hundred sixty-six".