1660607647 has 2 divisors, whose sum is σ = 1660607648. Its totient is φ = 1660607646.

The previous prime is 1660607623. The next prime is 1660607653. The reversal of 1660607647 is 7467060661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1660607647 - 2⁷ = 1660607519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1660607147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830303823 + 830303824.

It is an arithmetic number, because the mean of its divisors is an integer number (830303824).

Almost surely, 2^1660607647 is an apocalyptic number.

1660607647 is a deficient number, since it is larger than the sum of its proper divisors (1).

1660607647 is an equidigital number, since it uses as much as digits as its factorization.

1660607647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 43.

The square root of 1660607647 is about 40750.5539471551. The cubic root of 1660607647 is about 1184.1926044772.

The spelling of 1660607647 in words is "one billion, six hundred sixty million, six hundred seven thousand, six hundred forty-seven".