660149 has 4 divisors (see below), whose sum is σ = 754464. Its totient is φ = 565836.

The previous prime is 660137. The next prime is 660157. The reversal of 660149 is 941066.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-660149 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 (660119) 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, 47147 + ... + 47160.

It is an arithmetic number, because the mean of its divisors is an integer number (188616).

2⁶⁶⁰¹⁴⁹ is an apocalyptic number.

It is an amenable number.

660149 is a deficient number, since it is larger than the sum of its proper divisors (94315).

660149 is an equidigital number, since it uses as much as digits as its factorization.

660149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94314.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 660149 is about 812.4955384493. The cubic root of 660149 is about 87.0724283458.

The spelling of 660149 in words is "six hundred sixty thousand, one hundred forty-nine".