667100400 has 240 divisors, whose sum is σ = 2309075424. Its totient is φ = 164003840.

The previous prime is 667100387. The next prime is 667100407. The reversal of 667100400 is 4001766.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667100407) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1080892 + ... + 1081508.

Almost surely, 2^667100400 is an apocalyptic number.

667100400 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 667100400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1154537712).

667100400 is an abundant number, since it is smaller than the sum of its proper divisors (1641975024).

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

667100400 is a wasteful number, since it uses less digits than its factorization.

667100400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708 (or 697 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 667100400 is about 25828.2868189123. The cubic root of 667100400 is about 873.7698741491.

The spelling of 667100400 in words is "six hundred sixty-seven million, one hundred thousand, four hundred".