1659420667 has 2 divisors, whose sum is σ = 1659420668. Its totient is φ = 1659420666.

The previous prime is 1659420649. The next prime is 1659420739. The reversal of 1659420667 is 7660249561.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1659420667 is a prime.

It is not a weakly prime, because it can be changed into another prime (1659420647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 829710333 + 829710334.

It is an arithmetic number, because the mean of its divisors is an integer number (829710334).

Almost surely, 2^1659420667 is an apocalyptic number.

1659420667 is a deficient number, since it is larger than the sum of its proper divisors (1).

1659420667 is an equidigital number, since it uses as much as digits as its factorization.

1659420667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 46.

The square root of 1659420667 is about 40735.9873698920. The cubic root of 1659420667 is about 1183.9103889124.

The spelling of 1659420667 in words is "one billion, six hundred fifty-nine million, four hundred twenty thousand, six hundred sixty-seven".