667201651 has 8 divisors (see below), whose sum is σ = 684206208. Its totient is φ = 650232000.

The previous prime is 667201627. The next prime is 667201679. The reversal of 667201651 is 156102766.

It is a happy number.

667201651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667201651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667201751) 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, 32421 + ... + 48841.

It is an arithmetic number, because the mean of its divisors is an integer number (85525776).

Almost surely, 2^667201651 is an apocalyptic number.

667201651 is a deficient number, since it is larger than the sum of its proper divisors (17004557).

667201651 is a wasteful number, since it uses less digits than its factorization.

667201651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17453.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 667201651 is about 25830.2468242175. The cubic root of 667201651 is about 873.8140781889.

The spelling of 667201651 in words is "six hundred sixty-seven million, two hundred one thousand, six hundred fifty-one".