1606966091 has 4 divisors (see below), whose sum is σ = 1609259184. Its totient is φ = 1604673000.

The previous prime is 1606966079. The next prime is 1606966103. The reversal of 1606966091 is 1906696061.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1606966079) and next prime (1606966103).

It is a cyclic number.

It is not a de Polignac number, because 1606966091 - 2⁶ = 1606966027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1606936091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1145495 + ... + 1146896.

It is an arithmetic number, because the mean of its divisors is an integer number (402314796).

Almost surely, 2^1606966091 is an apocalyptic number.

1606966091 is a deficient number, since it is larger than the sum of its proper divisors (2293093).

1606966091 is an equidigital number, since it uses as much as digits as its factorization.

1606966091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2293092.

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 1606966091 is about 40086.9815650917. The cubic root of 1606966091 is about 1171.3020522922.

The spelling of 1606966091 in words is "one billion, six hundred six million, nine hundred sixty-six thousand, ninety-one".