66369960 has 96 divisors (see below), whose sum is σ = 217844640. Its totient is φ = 17523072.

The previous prime is 66369937. The next prime is 66369967. The reversal of 66369960 is 6996366.

66369960 is a `hidden beast` number, since 6 + 636 + 9 + 9 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (66369967) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37659 + ... + 39381.

It is an arithmetic number, because the mean of its divisors is an integer number (2269215).

Almost surely, 2^66369960 is an apocalyptic number.

66369960 is a gapful number since it is divisible by the number (60) 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 66369960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108922320).

66369960 is an abundant number, since it is smaller than the sum of its proper divisors (151474680).

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

66369960 is a wasteful number, since it uses less digits than its factorization.

66369960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1847 (or 1840 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 45.

The square root of 66369960 is about 8146.7760494566. The cubic root of 66369960 is about 404.8776951222.

The spelling of 66369960 in words is "sixty-six million, three hundred sixty-nine thousand, nine hundred sixty".