666533376 has 240 divisors, whose sum is σ = 2119328640. Its totient is φ = 200724480.

The previous prime is 666533369. The next prime is 666533381. The reversal of 666533376 is 673335666.

666533376 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Its product of digits (1224720) is a multiple of the sum of its prime divisors (378).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2013531 + ... + 2013861.

It is an arithmetic number, because the mean of its divisors is an integer number (8830536).

Almost surely, 2^666533376 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 666533376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1059664320).

666533376 is an abundant number, since it is smaller than the sum of its proper divisors (1452795264).

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

666533376 is a wasteful number, since it uses less digits than its factorization.

666533376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397 (or 378 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 45.

The square root of 666533376 is about 25817.3076830254. The cubic root of 666533376 is about 873.5222407945.

The spelling of 666533376 in words is "six hundred sixty-six million, five hundred thirty-three thousand, three hundred seventy-six".