147243666 has 8 divisors (see below), whose sum is σ = 294487344. Its totient is φ = 49081220.

The previous prime is 147243659. The next prime is 147243697. The reversal of 147243666 is 666342741.

It is a happy number.

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

147243666 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12270300 + ... + 12270311.

It is an arithmetic number, because the mean of its divisors is an integer number (36810918).

Almost surely, 2^147243666 is an apocalyptic number.

147243666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

147243666 is a wasteful number, since it uses less digits than its factorization.

147243666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24540616.

The product of its digits is 145152, while the sum is 39.

The square root of 147243666 is about 12134.4001087816. The cubic root of 147243666 is about 528.0546531466.

The spelling of 147243666 in words is "one hundred forty-seven million, two hundred forty-three thousand, six hundred sixty-six".