666102142 has 8 divisors (see below), whose sum is σ = 1020411936. Its totient is φ = 325964832.

The previous prime is 666102137. The next prime is 666102169. The reversal of 666102142 is 241201666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 666102142.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3543003 + ... + 3543190.

It is an arithmetic number, because the mean of its divisors is an integer number (127551492).

Almost surely, 2^666102142 is an apocalyptic number.

666102142 is a deficient number, since it is larger than the sum of its proper divisors (354309794).

666102142 is a wasteful number, since it uses less digits than its factorization.

666102142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7086242.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 666102142 is about 25808.9546863099. The cubic root of 666102142 is about 873.3338162433. Note that the first 3 decimals are identical.

The spelling of 666102142 in words is "six hundred sixty-six million, one hundred two thousand, one hundred forty-two".