166795421 has 8 divisors (see below), whose sum is σ = 184007544. Its totient is φ = 150209280.

The previous prime is 166795417. The next prime is 166795423. The reversal of 166795421 is 124597661.

166795421 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 4 ways, for example, as 24025 + 166771396 = 155^2 + 12914^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 166795421 - 2² = 166795417 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166795423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155936 + ... + 157001.

It is an arithmetic number, because the mean of its divisors is an integer number (23000943).

Almost surely, 2^166795421 is an apocalyptic number.

It is an amenable number.

166795421 is a deficient number, since it is larger than the sum of its proper divisors (17212123).

166795421 is a wasteful number, since it uses less digits than its factorization.

166795421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312991.

The product of its digits is 90720, while the sum is 41.

The square root of 166795421 is about 12914.9301585413. The cubic root of 166795421 is about 550.4628841531.

The spelling of 166795421 in words is "one hundred sixty-six million, seven hundred ninety-five thousand, four hundred twenty-one".