332021661 has 4 divisors (see below), whose sum is σ = 442695552. Its totient is φ = 221347772.

The previous prime is 332021659. The next prime is 332021681. The reversal of 332021661 is 166120233.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 332021661 - 2¹ = 332021659 is a prime.

It is a super-2 number, since 2×332021661² = 220476766746397842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (332021621) 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, 55336941 + ... + 55336946.

It is an arithmetic number, because the mean of its divisors is an integer number (110673888).

Almost surely, 2^332021661 is an apocalyptic number.

It is an amenable number.

332021661 is a deficient number, since it is larger than the sum of its proper divisors (110673891).

332021661 is a wasteful number, since it uses less digits than its factorization.

332021661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110673890.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 332021661 is about 18221.4615495026. The cubic root of 332021661 is about 692.4506160181.

Adding to 332021661 its reverse (166120233), we get a palindrome (498141894).

The spelling of 332021661 in words is "three hundred thirty-two million, twenty-one thousand, six hundred sixty-one".