664833148 has 48 divisors (see below), whose sum is σ = 1367559424. Its totient is φ = 276877440.

The previous prime is 664833107. The next prime is 664833151. The reversal of 664833148 is 841338466.

It is a super-2 number, since 2×664833148² = 884006229359179808, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 252736 + ... + 255352.

Almost surely, 2^664833148 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 664833148, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (683779712).

664833148 is an abundant number, since it is smaller than the sum of its proper divisors (702726276).

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

664833148 is a wasteful number, since it uses less digits than its factorization.

664833148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2882 (or 2880 counting only the distinct ones).

The product of its digits is 331776, while the sum is 43.

The square root of 664833148 is about 25784.3585919836. The cubic root of 664833148 is about 872.7788663693.

The spelling of 664833148 in words is "six hundred sixty-four million, eight hundred thirty-three thousand, one hundred forty-eight".