1667066400 has 288 divisors, whose sum is σ = 6091485120. Its totient is φ = 439971840.

The previous prime is 1667066353. The next prime is 1667066411. The reversal of 1667066400 is 46607661.

1667066400 is a `hidden beast` number, since 1 + 6 + 6 + 7 + 0 + 6 + 640 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is a super-2 number, since 2×1667066400² = 5558220764017920000, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2440459 + ... + 2441141.

It is an arithmetic number, because the mean of its divisors is an integer number (21150990).

Almost surely, 2^1667066400 is an apocalyptic number.

1667066400 is a gapful number since it is divisible by the number (10) 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 1667066400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3045742560).

1667066400 is an abundant number, since it is smaller than the sum of its proper divisors (4424418720).

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

1667066400 is a wasteful number, since it uses less digits than its factorization.

1667066400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825 (or 806 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 1667066400 is about 40829.7244663738. The cubic root of 1667066400 is about 1185.7258811742.

The spelling of 1667066400 in words is "one billion, six hundred sixty-seven million, sixty-six thousand, four hundred".