667342551 has 8 divisors (see below), whose sum is σ = 890490880. Its totient is φ = 444544632.

The previous prime is 667342547. The next prime is 667342553. The reversal of 667342551 is 155243766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 667342551 - 2² = 667342547 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 (667342553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83125 + ... + 90798.

It is an arithmetic number, because the mean of its divisors is an integer number (111311360).

Almost surely, 2^667342551 is an apocalyptic number.

667342551 is a deficient number, since it is larger than the sum of its proper divisors (223148329).

667342551 is a wasteful number, since it uses less digits than its factorization.

667342551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175205.

The product of its digits is 151200, while the sum is 39.

The square root of 667342551 is about 25832.9741028787. The cubic root of 667342551 is about 873.8755847003.

The spelling of 667342551 in words is "six hundred sixty-seven million, three hundred forty-two thousand, five hundred fifty-one".