664340160 has 224 divisors, whose sum is σ = 2346423552. Its totient is φ = 157880320.

The previous prime is 664340141. The next prime is 664340167. The reversal of 664340160 is 61043466.

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

It is not an unprimeable number, because it can be changed into a prime (664340167) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 559087 + ... + 560273.

Almost surely, 2^664340160 is an apocalyptic number.

664340160 is a gapful number since it is divisible by the number (60) 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 664340160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1173211776).

664340160 is an abundant number, since it is smaller than the sum of its proper divisors (1682083392).

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

664340160 is a wasteful number, since it uses less digits than its factorization.

664340160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271 (or 1261 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 664340160 is about 25774.7969924110. The cubic root of 664340160 is about 872.5630849590.

The spelling of 664340160 in words is "six hundred sixty-four million, three hundred forty thousand, one hundred sixty".