1272702666 has 8 divisors (see below), whose sum is σ = 2545405344. Its totient is φ = 424234220.

The previous prime is 1272702649. The next prime is 1272702667. The reversal of 1272702666 is 6662072721.

It is a happy number.

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

1272702666 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1272702667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106058550 + ... + 106058561.

It is an arithmetic number, because the mean of its divisors is an integer number (318175668).

Almost surely, 2^1272702666 is an apocalyptic number.

1272702666 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.

1272702666 is a wasteful number, since it uses less digits than its factorization.

1272702666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212117116.

The product of its (nonzero) digits is 84672, while the sum is 39.

The square root of 1272702666 is about 35674.9585283571. The cubic root of 1272702666 is about 1083.6997785396.

The spelling of 1272702666 in words is "one billion, two hundred seventy-two million, seven hundred two thousand, six hundred sixty-six".