1001606655 has 16 divisors (see below), whose sum is σ = 1831509504. Its totient is φ = 457877280.

The previous prime is 1001606581. The next prime is 1001606657. The reversal of 1001606655 is 5566061001.

It is not a de Polignac number, because 1001606655 - 2¹³ = 1001598463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001606657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4769451 + ... + 4769660.

It is an arithmetic number, because the mean of its divisors is an integer number (114469344).

Almost surely, 2^1001606655 is an apocalyptic number.

1001606655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1001606655 is a deficient number, since it is larger than the sum of its proper divisors (829902849).

1001606655 is an equidigital number, since it uses as much as digits as its factorization.

1001606655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9539126.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 1001606655 is about 31648.1698522995. The cubic root of 1001606655 is about 1000.5352651068.

Adding to 1001606655 its reverse (5566061001), we get a palindrome (6567667656).

The spelling of 1001606655 in words is "one billion, one million, six hundred six thousand, six hundred fifty-five".