147666481 has 4 divisors (see below), whose sum is σ = 147764464. Its totient is φ = 147568500.

The previous prime is 147666473. The next prime is 147666503. The reversal of 147666481 is 184666741.

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.

It is a cyclic number.

It is not a de Polignac number, because 147666481 - 2³ = 147666473 is a prime.

It is a super-2 number, since 2×147666481² = 43610779221846722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (147666781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46695 + ... + 49756.

It is an arithmetic number, because the mean of its divisors is an integer number (36941116).

Almost surely, 2^147666481 is an apocalyptic number.

It is an amenable number.

147666481 is a deficient number, since it is larger than the sum of its proper divisors (97983).

147666481 is an equidigital number, since it uses as much as digits as its factorization.

147666481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97982.

The product of its digits is 193536, while the sum is 43.

The square root of 147666481 is about 12151.8097829089. The cubic root of 147666481 is about 528.5596121850.

The spelling of 147666481 in words is "one hundred forty-seven million, six hundred sixty-six thousand, four hundred eighty-one".