1597666 has 16 divisors (see below), whose sum is σ = 2761920. Its totient is φ = 678960.

The previous prime is 1597663. The next prime is 1597679. The reversal of 1597666 is 6667951.

It is not an unprimeable number, because it can be changed into a prime (1597663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1536 + ... + 2356.

It is an arithmetic number, because the mean of its divisors is an integer number (172620).

2^1597666 is an apocalyptic number.

1597666 is a deficient number, since it is larger than the sum of its proper divisors (1164254).

1597666 is a wasteful number, since it uses less digits than its factorization.

1597666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969.

The product of its digits is 68040, while the sum is 40.

The square root of 1597666 is about 1263.9881328557. The cubic root of 1597666 is about 116.9038097070.

The spelling of 1597666 in words is "one million, five hundred ninety-seven thousand, six hundred sixty-six".