664154356 has 12 divisors (see below), whose sum is σ = 1162471492. Its totient is φ = 332019648.

The previous prime is 664154339. The next prime is 664154357. The reversal of 664154356 is 653451466.

664154356 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 349091856 + 315062500 = 18684^2 + 17750^2 .

It is a super-2 number, since 2×664154356² = 882202017187549472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664154357) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21586 + ... + 42358.

Almost surely, 2^664154356 is an apocalyptic number.

It is an amenable number.

664154356 is a deficient number, since it is larger than the sum of its proper divisors (498317136).

664154356 is a wasteful number, since it uses less digits than its factorization.

664154356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28770 (or 28768 counting only the distinct ones).

The product of its digits is 259200, while the sum is 40.

The square root of 664154356 is about 25771.1923666717. The cubic root of 664154356 is about 872.4817306377.

The spelling of 664154356 in words is "six hundred sixty-four million, one hundred fifty-four thousand, three hundred fifty-six".