150016661 has 4 divisors (see below), whose sum is σ = 150089772. Its totient is φ = 149943552.

The previous prime is 150016651. The next prime is 150016673. The reversal of 150016661 is 166610051.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1932100 + 148084561 = 1390^2 + 12169^2 .

It is a cyclic number.

It is not a de Polignac number, because 150016661 - 2⁶ = 150016597 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 150016661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (150016631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33386 + ... + 37611.

It is an arithmetic number, because the mean of its divisors is an integer number (37522443).

Almost surely, 2^150016661 is an apocalyptic number.

It is an amenable number.

150016661 is a deficient number, since it is larger than the sum of its proper divisors (73111).

150016661 is an equidigital number, since it uses as much as digits as its factorization.

150016661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73110.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 150016661 is about 12248.1288775061. The cubic root of 150016661 is about 531.3489560346.

The spelling of 150016661 in words is "one hundred fifty million, sixteen thousand, six hundred sixty-one".