150660661 has 2 divisors, whose sum is σ = 150660662. Its totient is φ = 150660660.

The previous prime is 150660659. The next prime is 150660673. The reversal of 150660661 is 166066051.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 149206225 + 1454436 = 12215^2 + 1206^2 .

It is a cyclic number.

It is not a de Polignac number, because 150660661 - 2¹ = 150660659 is a prime.

Together with 150660659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (150660641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75330330 + 75330331.

It is an arithmetic number, because the mean of its divisors is an integer number (75330331).

Almost surely, 2^150660661 is an apocalyptic number.

It is an amenable number.

150660661 is a deficient number, since it is larger than the sum of its proper divisors (1).

150660661 is an equidigital number, since it uses as much as digits as its factorization.

150660661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 150660661 is about 12274.3904532975. The cubic root of 150660661 is about 532.1082055610.

It can be divided in two parts, 150660 and 661, that added together give a square (151321 = 389²).

The spelling of 150660661 in words is "one hundred fifty million, six hundred sixty thousand, six hundred sixty-one".