666488592 has 360 divisors, whose sum is σ = 2452200192. Its totient is φ = 166924800.

The previous prime is 666488539. The next prime is 666488609. The reversal of 666488592 is 295884666.

It is a happy number.

It is a super-2 number, since 2×666488592² = 888414086532284928, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2405958 + ... + 2406234.

Almost surely, 2^666488592 is an apocalyptic number.

666488592 is a gapful number since it is divisible by the number (62) 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 666488592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1226100096).

666488592 is an abundant number, since it is smaller than the sum of its proper divisors (1785711600).

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

666488592 is a wasteful number, since it uses less digits than its factorization.

666488592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347 (or 331 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 54.

The square root of 666488592 is about 25816.4403433161. The cubic root of 666488592 is about 873.5026765348.

The spelling of 666488592 in words is "six hundred sixty-six million, four hundred eighty-eight thousand, five hundred ninety-two".