667248487 has 8 divisors (see below), whose sum is σ = 710835696. Its totient is φ = 624143232.

The previous prime is 667248481. The next prime is 667248497. The reversal of 667248487 is 784842766.

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

It is a cyclic number.

It is not a de Polignac number, because 667248487 - 2⁷ = 667248359 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 (667248481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117628 + ... + 123169.

It is an arithmetic number, because the mean of its divisors is an integer number (88854462).

Almost surely, 2^667248487 is an apocalyptic number.

667248487 is a deficient number, since it is larger than the sum of its proper divisors (43587209).

667248487 is a wasteful number, since it uses less digits than its factorization.

667248487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240977.

The product of its digits is 3612672, while the sum is 52.

The square root of 667248487 is about 25831.1534198533. The cubic root of 667248487 is about 873.8345242807.

The spelling of 667248487 in words is "six hundred sixty-seven million, two hundred forty-eight thousand, four hundred eighty-seven".