150666609 has 4 divisors (see below), whose sum is σ = 200888816. Its totient is φ = 100444404.

The previous prime is 150666559. The next prime is 150666611. The reversal of 150666609 is 906666051.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 150666609 - 2¹⁵ = 150633841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (150666679) 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, 25111099 + ... + 25111104.

It is an arithmetic number, because the mean of its divisors is an integer number (50222204).

Almost surely, 2^150666609 is an apocalyptic number.

It is an amenable number.

150666609 is a deficient number, since it is larger than the sum of its proper divisors (50222207).

150666609 is an equidigital number, since it uses as much as digits as its factorization.

150666609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50222206.

The product of its (nonzero) digits is 58320, while the sum is 39.

The square root of 150666609 is about 12274.6327439969. The cubic root of 150666609 is about 532.1152079152.

The spelling of 150666609 in words is "one hundred fifty million, six hundred sixty-six thousand, six hundred nine".