666095040 has 168 divisors, whose sum is σ = 2467465728. Its totient is φ = 163952640.

The previous prime is 666095033. The next prime is 666095063. The reversal of 666095040 is 40590666.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a zygodrome in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 666094986 and 666095004.

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, 28545 + ... + 46335.

It is an arithmetic number, because the mean of its divisors is an integer number (14687296).

Almost surely, 2^666095040 is an apocalyptic number.

666095040 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 666095040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1233732864).

666095040 is an abundant number, since it is smaller than the sum of its proper divisors (1801370688).

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

666095040 is a wasteful number, since it uses less digits than its factorization.

666095040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17827 (or 17814 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 666095040 is about 25808.8170980384. The cubic root of 666095040 is about 873.3307123956.

The spelling of 666095040 in words is "six hundred sixty-six million, ninety-five thousand, forty".