6661536 has 96 divisors (see below), whose sum is σ = 20901888. Its totient is φ = 1816320.

The previous prime is 6661511. The next prime is 6661547. The reversal of 6661536 is 6351666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 6661497 and 6661506.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15241 + ... + 15671.

It is an arithmetic number, because the mean of its divisors is an integer number (217728).

Almost surely, 2^6661536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6661536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10450944).

6661536 is an abundant number, since it is smaller than the sum of its proper divisors (14240352).

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

6661536 is a wasteful number, since it uses less digits than its factorization.

6661536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474 (or 466 counting only the distinct ones).

The product of its digits is 19440, while the sum is 33.

The square root of 6661536 is about 2580.9951569114. The cubic root of 6661536 is about 188.1589119633.

The spelling of 6661536 in words is "six million, six hundred sixty-one thousand, five hundred thirty-six".