664154514 has 48 divisors (see below), whose sum is σ = 1481851800. Its totient is φ = 214824960.

The previous prime is 664154507. The next prime is 664154539. The reversal of 664154514 is 415451466.

664154514 is a `hidden beast` number, since 6 + 641 + 5 + 4 + 5 + 1 + 4 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 663938289 + 216225 = 25767^2 + 465^2 .

It is a super-2 number, since 2×664154514² = 882202436933152392, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 297924 + ... + 300144.

Almost surely, 2^664154514 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 664154514, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (740925900).

664154514 is an abundant number, since it is smaller than the sum of its proper divisors (817697286).

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

664154514 is a wasteful number, since it uses less digits than its factorization.

664154514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2715 (or 2712 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 664154514 is about 25771.1954321099. The cubic root of 664154514 is about 872.4817998245.

The spelling of 664154514 in words is "six hundred sixty-four million, one hundred fifty-four thousand, five hundred fourteen".