214001666 has 4 divisors (see below), whose sum is σ = 321002502. Its totient is φ = 107000832.

The previous prime is 214001621. The next prime is 214001677. The reversal of 214001666 is 666100412.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 153239641 + 60762025 = 12379^2 + 7795^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53500415 + ... + 53500418.

Almost surely, 2^214001666 is an apocalyptic number.

214001666 is a deficient number, since it is larger than the sum of its proper divisors (107000836).

214001666 is a wasteful number, since it uses less digits than its factorization.

214001666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107000835.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 214001666 is about 14628.7957809247. The cubic root of 214001666 is about 598.1439551569.

The spelling of 214001666 in words is "two hundred fourteen million, one thousand, six hundred sixty-six".