666016251 has 8 divisors (see below), whose sum is σ = 888670224. Its totient is φ = 443686560.

The previous prime is 666016229. The next prime is 666016277. The reversal of 666016251 is 152610666.

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

It is not a de Polignac number, because 666016251 - 2⁶ = 666016187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (666016951) 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, 76236 + ... + 84521.

It is an arithmetic number, because the mean of its divisors is an integer number (111083778).

Almost surely, 2^666016251 is an apocalyptic number.

666016251 is a deficient number, since it is larger than the sum of its proper divisors (222653973).

666016251 is a wasteful number, since it uses less digits than its factorization.

666016251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162141.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 666016251 is about 25807.2906559367. The cubic root of 666016251 is about 873.2962770860.

The spelling of 666016251 in words is "six hundred sixty-six million, sixteen thousand, two hundred fifty-one".