668633274 has 24 divisors (see below), whose sum is σ = 1449695520. Its totient is φ = 222725448.

The previous prime is 668633269. The next prime is 668633297. The reversal of 668633274 is 472336866.

668633274 is a `hidden beast` number, since 6 + 6 + 8 + 633 + 2 + 7 + 4 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16149 + ... + 39975.

It is an arithmetic number, because the mean of its divisors is an integer number (60403980).

Almost surely, 2^668633274 is an apocalyptic number.

668633274 is an abundant number, since it is smaller than the sum of its proper divisors (781062246).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

668633274 is a wasteful number, since it uses less digits than its factorization.

668633274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25394 (or 25391 counting only the distinct ones).

The product of its digits is 870912, while the sum is 45.

The square root of 668633274 is about 25857.9441178142. The cubic root of 668633274 is about 874.4386163391.

The spelling of 668633274 in words is "six hundred sixty-eight million, six hundred thirty-three thousand, two hundred seventy-four".