166121446 has 8 divisors (see below), whose sum is σ = 262297080. Its totient is φ = 78689088.

The previous prime is 166121443. The next prime is 166121471. The reversal of 166121446 is 644121661.

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

It is a super-2 number, since 2×166121446² = 55192669642261832, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166121443) 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, 2185771 + ... + 2185846.

It is an arithmetic number, because the mean of its divisors is an integer number (32787135).

Almost surely, 2^166121446 is an apocalyptic number.

166121446 is a deficient number, since it is larger than the sum of its proper divisors (96175634).

166121446 is a wasteful number, since it uses less digits than its factorization.

166121446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4371638.

The product of its digits is 6912, while the sum is 31.

The square root of 166121446 is about 12888.8108838636. The cubic root of 166121446 is about 549.7204595991.

The spelling of 166121446 in words is "one hundred sixty-six million, one hundred twenty-one thousand, four hundred forty-six".