660374213 has 4 divisors (see below), whose sum is σ = 660890208. Its totient is φ = 659858220.

The previous prime is 660374207. The next prime is 660374233. The reversal of 660374213 is 312473066.

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 not a de Polignac number, because 660374213 - 2⁶ = 660374149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 660374213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660374233) 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, 256073 + ... + 258638.

It is an arithmetic number, because the mean of its divisors is an integer number (165222552).

Almost surely, 2^660374213 is an apocalyptic number.

It is an amenable number.

660374213 is a deficient number, since it is larger than the sum of its proper divisors (515995).

660374213 is a wasteful number, since it uses less digits than its factorization.

660374213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515994.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 660374213 is about 25697.7472358960. The cubic root of 660374213 is about 870.8232894568.

The spelling of 660374213 in words is "six hundred sixty million, three hundred seventy-four thousand, two hundred thirteen".