1215066673 has 4 divisors (see below), whose sum is σ = 1215291888. Its totient is φ = 1214841460.

The previous prime is 1215066661. The next prime is 1215066683. The reversal of 1215066673 is 3766605121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1215066673 - 2⁹ = 1215066161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1215066613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104311 + ... + 115372.

It is an arithmetic number, because the mean of its divisors is an integer number (303822972).

Almost surely, 2^1215066673 is an apocalyptic number.

It is an amenable number.

1215066673 is a deficient number, since it is larger than the sum of its proper divisors (225215).

1215066673 is an equidigital number, since it uses as much as digits as its factorization.

1215066673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225214.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 1215066673 is about 34857.8064857788. The cubic root of 1215066673 is about 1067.0875094054.

The spelling of 1215066673 in words is "one billion, two hundred fifteen million, sixty-six thousand, six hundred seventy-three".