1606266646 has 4 divisors (see below), whose sum is σ = 2409399972. Its totient is φ = 803133322.

The previous prime is 1606266611. The next prime is 1606266647. The reversal of 1606266646 is 6466626061.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1606266647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 401566660 + ... + 401566663.

It is an arithmetic number, because the mean of its divisors is an integer number (602349993).

Almost surely, 2^1606266646 is an apocalyptic number.

1606266646 is a deficient number, since it is larger than the sum of its proper divisors (803133326).

1606266646 is an equidigital number, since it uses as much as digits as its factorization.

1606266646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803133325.

The product of its (nonzero) digits is 373248, while the sum is 43.

The square root of 1606266646 is about 40078.2565239557. The cubic root of 1606266646 is about 1171.1320880637.

The spelling of 1606266646 in words is "one billion, six hundred six million, two hundred sixty-six thousand, six hundred forty-six".