1252011666 has 8 divisors (see below), whose sum is σ = 2504023344. Its totient is φ = 417337220.

The previous prime is 1252011653. The next prime is 1252011679. The reversal of 1252011666 is 6661102521.

It is an interprime number because it is at equal distance from previous prime (1252011653) and next prime (1252011679).

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

1252011666 is an admirable 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, 104334300 + ... + 104334311.

It is an arithmetic number, because the mean of its divisors is an integer number (313002918).

Almost surely, 2^1252011666 is an apocalyptic number.

1252011666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1252011666 is a wasteful number, since it uses less digits than its factorization.

1252011666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208668616.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 1252011666 is about 35383.7768758509. The cubic root of 1252011666 is about 1077.7949023680.

The spelling of 1252011666 in words is "one billion, two hundred fifty-two million, eleven thousand, six hundred sixty-six".