66402336 has 192 divisors, whose sum is σ = 234372096. Its totient is φ = 15897600.

The previous prime is 66402319. The next prime is 66402337. The reversal of 66402336 is 63320466.

It is not an unprimeable number, because it can be changed into a prime (66402337) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 95751 + ... + 96441.

It is an arithmetic number, because the mean of its divisors is an integer number (1220688).

Almost surely, 2^66402336 is an apocalyptic number.

66402336 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66402336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117186048).

66402336 is an abundant number, since it is smaller than the sum of its proper divisors (167969760).

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

66402336 is a wasteful number, since it uses less digits than its factorization.

66402336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735 (or 727 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 30.

The square root of 66402336 is about 8148.7628508872. The cubic root of 66402336 is about 404.9435190250.

The spelling of 66402336 in words is "sixty-six million, four hundred two thousand, three hundred thirty-six".