666077340 has 96 divisors (see below), whose sum is σ = 1981082880. Its totient is φ = 166634496.

The previous prime is 666077317. The next prime is 666077389. The reversal of 666077340 is 43770666.

666077340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×666077340² = 887318045722951200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 385719 + ... + 387441.

It is an arithmetic number, because the mean of its divisors is an integer number (20636280).

Almost surely, 2^666077340 is an apocalyptic number.

666077340 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 666077340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (990541440).

666077340 is an abundant number, since it is smaller than the sum of its proper divisors (1315005540).

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

666077340 is a wasteful number, since it uses less digits than its factorization.

666077340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2131 (or 2129 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 39.

The square root of 666077340 is about 25808.4741896920. The cubic root of 666077340 is about 873.3229767174.

The spelling of 666077340 in words is "six hundred sixty-six million, seventy-seven thousand, three hundred forty".