666536796 has 96 divisors (see below), whose sum is σ = 1868384000. Its totient is φ = 204773184.

The previous prime is 666536791. The next prime is 666536807. The reversal of 666536796 is 697635666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666536791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71535 + ... + 80313.

Almost surely, 2^666536796 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 666536796, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (934192000).

666536796 is an abundant number, since it is smaller than the sum of its proper divisors (1201847204).

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

666536796 is a wasteful number, since it uses less digits than its factorization.

666536796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8848 (or 8840 counting only the distinct ones).

The product of its digits is 7348320, while the sum is 54.

The square root of 666536796 is about 25817.3739175773. The cubic root of 666536796 is about 873.5237348137.

The spelling of 666536796 in words is "six hundred sixty-six million, five hundred thirty-six thousand, seven hundred ninety-six".