666430064 has 40 divisors (see below), whose sum is σ = 1341199872. Its totient is φ = 320448960.

The previous prime is 666430027. The next prime is 666430091. The reversal of 666430064 is 460034666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76727 + ... + 84969.

Almost surely, 2^666430064 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666430064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (670599936).

666430064 is an abundant number, since it is smaller than the sum of its proper divisors (674769808).

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

666430064 is a wasteful number, since it uses less digits than its factorization.

666430064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8445 (or 8439 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 35.

The square root of 666430064 is about 25815.3067771816. The cubic root of 666430064 is about 873.4771067742.

The spelling of 666430064 in words is "six hundred sixty-six million, four hundred thirty thousand, sixty-four".