166321422 has 24 divisors (see below), whose sum is σ = 360600240. Its totient is φ = 55404000.

The previous prime is 166321381. The next prime is 166321427. The reversal of 166321422 is 224123661.

166321422 is a `hidden beast` number, since 1 + 6 + 632 + 1 + 4 + 22 = 666.

It is a super-2 number, since 2×166321422² = 55325630832204168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166321427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52479 + ... + 55557.

It is an arithmetic number, because the mean of its divisors is an integer number (15025010).

Almost surely, 2^166321422 is an apocalyptic number.

166321422 is an abundant number, since it is smaller than the sum of its proper divisors (194278818).

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

166321422 is a wasteful number, since it uses less digits than its factorization.

166321422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6088 (or 6085 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 166321422 is about 12896.5662871944. The cubic root of 166321422 is about 549.9409545429.

The spelling of 166321422 in words is "one hundred sixty-six million, three hundred twenty-one thousand, four hundred twenty-two".