146665971 has 20 divisors (see below), whose sum is σ = 219478512. Its totient is φ = 97605648.

The previous prime is 146665951. The next prime is 146665973. The reversal of 146665971 is 179566641.

It is not a de Polignac number, because 146665971 - 2⁹ = 146665459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (146665973) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 58965 + ... + 61401.

Almost surely, 2^146665971 is an apocalyptic number.

146665971 is a deficient number, since it is larger than the sum of its proper divisors (72812541).

146665971 is an equidigital number, since it uses as much as digits as its factorization.

146665971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3192 (or 3183 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 146665971 is about 12110.5726949637. The cubic root of 146665971 is about 527.3631591019.

The spelling of 146665971 in words is "one hundred forty-six million, six hundred sixty-five thousand, nine hundred seventy-one".