166672101 has 4 divisors (see below), whose sum is σ = 222229472. Its totient is φ = 111114732.

The previous prime is 166672073. The next prime is 166672111. The reversal of 166672101 is 101276661.

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, and also an emirpimes, since its reverse is a distinct semiprime: 101276661 = 3 ⋅33758887.

It is a de Polignac number, because none of the positive numbers 2^k-166672101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166672111) 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, 27778681 + ... + 27778686.

It is an arithmetic number, because the mean of its divisors is an integer number (55557368).

Almost surely, 2^166672101 is an apocalyptic number.

It is an amenable number.

166672101 is a deficient number, since it is larger than the sum of its proper divisors (55557371).

166672101 is an equidigital number, since it uses as much as digits as its factorization.

166672101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55557370.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 166672101 is about 12910.1549564674. The cubic root of 166672101 is about 550.3271893419.

The spelling of 166672101 in words is "one hundred sixty-six million, six hundred seventy-two thousand, one hundred one".