667342251 has 12 divisors (see below), whose sum is σ = 969326280. Its totient is φ = 442408320.

The previous prime is 667342231. The next prime is 667342267. The reversal of 667342251 is 152243766.

667342251 is a `hidden beast` number, since 6 + 67 + 342 + 251 = 666.

It is not a de Polignac number, because 667342251 - 2¹¹ = 667340203 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (667342211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 205510 + ... + 208731.

It is an arithmetic number, because the mean of its divisors is an integer number (80777190).

Almost surely, 2^667342251 is an apocalyptic number.

667342251 is a deficient number, since it is larger than the sum of its proper divisors (301984029).

667342251 is a wasteful number, since it uses less digits than its factorization.

667342251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414426 (or 414423 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 667342251 is about 25832.9682963457. The cubic root of 667342251 is about 873.8754537517.

The spelling of 667342251 in words is "six hundred sixty-seven million, three hundred forty-two thousand, two hundred fifty-one".