662133121 has 4 divisors (see below), whose sum is σ = 713066452. Its totient is φ = 611199792.

The previous prime is 662133113. The next prime is 662133127. The reversal of 662133121 is 121331266.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 416772225 + 245360896 = 20415^2 + 15664^2 .

It is a cyclic number.

It is not a de Polignac number, because 662133121 - 2³ = 662133113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (662133127) 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, 25466646 + ... + 25466671.

It is an arithmetic number, because the mean of its divisors is an integer number (178266613).

Almost surely, 2^662133121 is an apocalyptic number.

It is an amenable number.

662133121 is a deficient number, since it is larger than the sum of its proper divisors (50933331).

662133121 is a wasteful number, since it uses less digits than its factorization.

662133121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50933330.

The product of its digits is 1296, while the sum is 25.

The square root of 662133121 is about 25731.9474777950. The cubic root of 662133121 is about 871.5957505530.

Adding to 662133121 its reverse (121331266), we get a palindrome (783464387).

The spelling of 662133121 in words is "six hundred sixty-two million, one hundred thirty-three thousand, one hundred twenty-one".