1606662620 has 24 divisors (see below), whose sum is σ = 3374786688. Its totient is φ = 642513600.

The previous prime is 1606662619. The next prime is 1606662647. The reversal of 1606662620 is 262666061.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122165 + ... + 134675.

It is an arithmetic number, because the mean of its divisors is an integer number (140616112).

Almost surely, 2^1606662620 is an apocalyptic number.

1606662620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1606662620 is an abundant number, since it is smaller than the sum of its proper divisors (1768124068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1606662620 is a wasteful number, since it uses less digits than its factorization.

1606662620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18941 (or 18939 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 1606662620 is about 40083.1962298418. The cubic root of 1606662620 is about 1171.2283152908.

The spelling of 1606662620 in words is "one billion, six hundred six million, six hundred sixty-two thousand, six hundred twenty".