664088406 has 32 divisors (see below), whose sum is σ = 1339578240. Its totient is φ = 219469824.

The previous prime is 664088393. The next prime is 664088419. The reversal of 664088406 is 604880466.

It is an interprime number because it is at equal distance from previous prime (664088393) and next prime (664088419).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 751641 + ... + 752523.

It is an arithmetic number, because the mean of its divisors is an integer number (41861820).

Almost surely, 2^664088406 is an apocalyptic number.

664088406 is an abundant number, since it is smaller than the sum of its proper divisors (675489834).

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

664088406 is a wasteful number, since it uses less digits than its factorization.

664088406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1820.

The product of its (nonzero) digits is 221184, while the sum is 42.

The square root of 664088406 is about 25769.9128054404. The cubic root of 664088406 is about 872.4528507675.

The spelling of 664088406 in words is "six hundred sixty-four million, eighty-eight thousand, four hundred six".