666672600 has 192 divisors, whose sum is σ = 2283603840. Its totient is φ = 159539200.

The previous prime is 666672583. The next prime is 666672607. The reversal of 666672600 is 6276666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666672607) 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, 547192 + ... + 548408.

It is an arithmetic number, because the mean of its divisors is an integer number (11893770).

Almost surely, 2^666672600 is an apocalyptic number.

666672600 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 666672600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1141801920).

666672600 is an abundant number, since it is smaller than the sum of its proper divisors (1616931240).

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

666672600 is a wasteful number, since it uses less digits than its factorization.

666672600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330 (or 1321 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 39.

The square root of 666672600 is about 25820.0038729664. The cubic root of 666672600 is about 873.5830563507.

The spelling of 666672600 in words is "six hundred sixty-six million, six hundred seventy-two thousand, six hundred".