160660991 has 2 divisors, whose sum is σ = 160660992. Its totient is φ = 160660990.

The previous prime is 160660961. The next prime is 160661009. The reversal of 160660991 is 199066061.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 160660991 - 2¹⁴ = 160644607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (160660961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80330495 + 80330496.

It is an arithmetic number, because the mean of its divisors is an integer number (80330496).

Almost surely, 2^160660991 is an apocalyptic number.

160660991 is a deficient number, since it is larger than the sum of its proper divisors (1).

160660991 is an equidigital number, since it uses as much as digits as its factorization.

160660991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 160660991 is about 12675.2116747611. The cubic root of 160660991 is about 543.6300818743.

The spelling of 160660991 in words is "one hundred sixty million, six hundred sixty thousand, nine hundred ninety-one".