8401566 has 8 divisors (see below), whose sum is σ = 16803144. Its totient is φ = 2800520.

The previous prime is 8401559. The next prime is 8401573. The reversal of 8401566 is 6651048.

It is an interprime number because it is at equal distance from previous prime (8401559) and next prime (8401573).

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

8401566 is an admirable number.

It is a super-2 number, since 2×8401566² = 141172622504712, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 700125 + ... + 700136.

It is an arithmetic number, because the mean of its divisors is an integer number (2100393).

Almost surely, 2^8401566 is an apocalyptic number.

8401566 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.

8401566 is a wasteful number, since it uses less digits than its factorization.

8401566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1400266.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 8401566 is about 2898.5454973141. The cubic root of 8401566 is about 203.2919029328.

The spelling of 8401566 in words is "eight million, four hundred one thousand, five hundred sixty-six".