147666316981 has 8 divisors (see below), whose sum is σ = 148561608384. Its totient is φ = 146771157600.

The previous prime is 147666316939. The next prime is 147666316991. The reversal of 147666316981 is 189613666741.

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

It is a cyclic number.

It is not a de Polignac number, because 147666316981 - 2¹⁹ = 147665792693 is a prime.

It is a super-2 number, since 2×147666316981² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (147666316901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3114906 + ... + 3161956.

It is an arithmetic number, because the mean of its divisors is an integer number (18570201048).

Almost surely, 2^147666316981 is an apocalyptic number.

It is an amenable number.

147666316981 is a deficient number, since it is larger than the sum of its proper divisors (895291403).

147666316981 is a wasteful number, since it uses less digits than its factorization.

147666316981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66011.

The product of its digits is 7838208, while the sum is 58.

The spelling of 147666316981 in words is "one hundred forty-seven billion, six hundred sixty-six million, three hundred sixteen thousand, nine hundred eighty-one".