664150440 has 32 divisors (see below), whose sum is σ = 1992451680. Its totient is φ = 177106752.

The previous prime is 664150411. The next prime is 664150477. The reversal of 664150440 is 44051466.

664150440 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 664150398 and 664150407.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2767174 + ... + 2767413.

It is an arithmetic number, because the mean of its divisors is an integer number (62264115).

Almost surely, 2^664150440 is an apocalyptic number.

664150440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

664150440 is an abundant number, since it is smaller than the sum of its proper divisors (1328301240).

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

664150440 is a wasteful number, since it uses less digits than its factorization.

664150440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5534601 (or 5534597 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 664150440 is about 25771.1163902536. The cubic root of 664150440 is about 872.4800158530.

The spelling of 664150440 in words is "six hundred sixty-four million, one hundred fifty thousand, four hundred forty".