151666531447 has 2 divisors, whose sum is σ = 151666531448. Its totient is φ = 151666531446.

The previous prime is 151666531427. The next prime is 151666531453. The reversal of 151666531447 is 744135666151.

It is a strong prime.

It is an emirp because it is prime and its reverse (744135666151) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-151666531447 is a prime.

It is a super-2 number, since 2×151666531447² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 151666531447.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (151666531417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75833265723 + 75833265724.

It is an arithmetic number, because the mean of its divisors is an integer number (75833265724).

Almost surely, 2^151666531447 is an apocalyptic number.

151666531447 is a deficient number, since it is larger than the sum of its proper divisors (1).

151666531447 is an equidigital number, since it uses as much as digits as its factorization.

151666531447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1814400, while the sum is 49.

The spelling of 151666531447 in words is "one hundred fifty-one billion, six hundred sixty-six million, five hundred thirty-one thousand, four hundred forty-seven".