1606655487 has 4 divisors (see below), whose sum is σ = 2142207320. Its totient is φ = 1071103656.

The previous prime is 1606655443. The next prime is 1606655489. The reversal of 1606655487 is 7845566061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7845566061 = 3 ⋅2615188687.

It is not a de Polignac number, because 1606655487 - 2⁷ = 1606655359 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 (1606655489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267775912 + ... + 267775917.

It is an arithmetic number, because the mean of its divisors is an integer number (535551830).

Almost surely, 2^1606655487 is an apocalyptic number.

1606655487 is a deficient number, since it is larger than the sum of its proper divisors (535551833).

1606655487 is an equidigital number, since it uses as much as digits as its factorization.

1606655487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535551832.

The product of its (nonzero) digits is 1209600, while the sum is 48.

The square root of 1606655487 is about 40083.1072523077. The cubic root of 1606655487 is about 1171.2265820117.

The spelling of 1606655487 in words is "one billion, six hundred six million, six hundred fifty-five thousand, four hundred eighty-seven".