666190752 has 24 divisors (see below), whose sum is σ = 1748750976. Its totient is φ = 222063552.

The previous prime is 666190741. The next prime is 666190769. The reversal of 666190752 is 257091666.

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3469648 + ... + 3469839.

It is an arithmetic number, because the mean of its divisors is an integer number (72864624).

Almost surely, 2^666190752 is an apocalyptic number.

It is an amenable number.

666190752 is an abundant number, since it is smaller than the sum of its proper divisors (1082560224).

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

666190752 is a wasteful number, since it uses less digits than its factorization.

666190752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6939500 (or 6939492 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 666190752 is about 25810.6712814681. The cubic root of 666190752 is about 873.3725403735.

The spelling of 666190752 in words is "six hundred sixty-six million, one hundred ninety thousand, seven hundred fifty-two".