141556661 has 8 divisors (see below), whose sum is σ = 144683448. Its totient is φ = 138456000.

The previous prime is 141556607. The next prime is 141556673. The reversal of 141556661 is 166655141.

It can be written as a sum of positive squares in 4 ways, for example, as 35343025 + 106213636 = 5945^2 + 10306^2 .

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 141556661 - 2²⁶ = 74447797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (141556361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4631 + ... + 17451.

It is an arithmetic number, because the mean of its divisors is an integer number (18085431).

Almost surely, 2^141556661 is an apocalyptic number.

It is an amenable number.

141556661 is a deficient number, since it is larger than the sum of its proper divisors (3126787).

141556661 is a wasteful number, since it uses less digits than its factorization.

141556661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13063.

The product of its digits is 21600, while the sum is 35.

The square root of 141556661 is about 11897.7586544693. The cubic root of 141556661 is about 521.1668336663.

The spelling of 141556661 in words is "one hundred forty-one million, five hundred fifty-six thousand, six hundred sixty-one".