145527661 has 2 divisors, whose sum is σ = 145527662. Its totient is φ = 145527660.

The previous prime is 145527659. The next prime is 145527673. The reversal of 145527661 is 166725541.

It is a happy number.

145527661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137030436 + 8497225 = 11706^2 + 2915^2 .

It is an emirp because it is prime and its reverse (166725541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145527661 - 2¹ = 145527659 is a prime.

It is a super-2 number, since 2×145527661² = 42356600232261842, which contains 22 as substring.

Together with 145527659, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 145527661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145527691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72763830 + 72763831.

It is an arithmetic number, because the mean of its divisors is an integer number (72763831).

Almost surely, 2^145527661 is an apocalyptic number.

It is an amenable number.

145527661 is a deficient number, since it is larger than the sum of its proper divisors (1).

145527661 is an equidigital number, since it uses as much as digits as its factorization.

145527661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50400, while the sum is 37.

The square root of 145527661 is about 12063.4846126648. The cubic root of 145527661 is about 525.9952832494.

The spelling of 145527661 in words is "one hundred forty-five million, five hundred twenty-seven thousand, six hundred sixty-one".