212166670 has 16 divisors (see below), whose sum is σ = 382095648. Its totient is φ = 84823200.

The previous prime is 212166667. The next prime is 212166701. The reversal of 212166670 is 76661212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21352 + ... + 29668.

It is an arithmetic number, because the mean of its divisors is an integer number (23880978).

Almost surely, 2^212166670 is an apocalyptic number.

212166670 is a deficient number, since it is larger than the sum of its proper divisors (169928978).

212166670 is a wasteful number, since it uses less digits than its factorization.

212166670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10875.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 212166670 is about 14565.9421253828. The cubic root of 212166670 is about 596.4294140467.

The spelling of 212166670 in words is "two hundred twelve million, one hundred sixty-six thousand, six hundred seventy".