666150000 has 120 divisors (see below), whose sum is σ = 2151456048. Its totient is φ = 177600000.

The previous prime is 666149993. The next prime is 666150031. The reversal of 666150000 is 51666.

It is a tau number, because it is divible by the number of its divisors (120).

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

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, 147780 + ... + 152220.

Almost surely, 2^666150000 is an apocalyptic number.

666150000 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 666150000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1075728024).

666150000 is an abundant number, since it is smaller than the sum of its proper divisors (1485306048).

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

666150000 is an equidigital number, since it uses as much as digits as its factorization.

666150000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4477 (or 4451 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 666150000 is about 25809.8818284780. The cubic root of 666150000 is about 873.3547314584.

The spelling of 666150000 in words is "six hundred sixty-six million, one hundred fifty thousand".