1666870202 has 8 divisors (see below), whose sum is σ = 2567881236. Its totient is φ = 810909792.

The previous prime is 1666870199. The next prime is 1666870241. The reversal of 1666870202 is 2020786661.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1606326241 + 60543961 = 40079^2 + 7781^2 .

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

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, 11262563 + ... + 11262710.

Almost surely, 2^1666870202 is an apocalyptic number.

1666870202 is a deficient number, since it is larger than the sum of its proper divisors (901011034).

1666870202 is a wasteful number, since it uses less digits than its factorization.

1666870202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22525312.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 1666870202 is about 40827.3217588418. The cubic root of 1666870202 is about 1185.6793630964.

The spelling of 1666870202 in words is "one billion, six hundred sixty-six million, eight hundred seventy thousand, two hundred two".