667144601 has 8 divisors (see below), whose sum is σ = 699223104. Its totient is φ = 635322160.

The previous prime is 667144573. The next prime is 667144609. The reversal of 667144601 is 106441766.

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 667144601 - 2¹⁸ = 666882457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667144609) 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, 58670 + ... + 69111.

It is an arithmetic number, because the mean of its divisors is an integer number (87402888).

Almost surely, 2^667144601 is an apocalyptic number.

It is an amenable number.

667144601 is a deficient number, since it is larger than the sum of its proper divisors (32078503).

667144601 is a wasteful number, since it uses less digits than its factorization.

667144601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128031.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 667144601 is about 25829.1424751191. The cubic root of 667144601 is about 873.7891719186.

The spelling of 667144601 in words is "six hundred sixty-seven million, one hundred forty-four thousand, six hundred one".