1663970567 has 6 divisors (see below), whose sum is σ = 1935639288. Its totient is φ = 1426260444.

The previous prime is 1663970521. The next prime is 1663970573. The reversal of 1663970567 is 7650793661.

It is a de Polignac number, because none of the positive numbers 2^k-1663970567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663970507) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16979243 + ... + 16979340.

It is an arithmetic number, because the mean of its divisors is an integer number (322606548).

Almost surely, 2^1663970567 is an apocalyptic number.

1663970567 is a deficient number, since it is larger than the sum of its proper divisors (271668721).

1663970567 is an equidigital number, since it uses as much as digits as its factorization.

1663970567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33958597 (or 33958590 counting only the distinct ones).

The product of its (nonzero) digits is 1428840, while the sum is 50.

The square root of 1663970567 is about 40791.7953392591. The cubic root of 1663970567 is about 1184.9914405311.

The spelling of 1663970567 in words is "one billion, six hundred sixty-three million, nine hundred seventy thousand, five hundred sixty-seven".