1664516 has 12 divisors (see below), whose sum is σ = 3329088. Its totient is φ = 713352.

The previous prime is 1664501. The next prime is 1664543. The reversal of 1664516 is 6154661.

1664516 is an admirable number.

It is a super-2 number, since 2×1664516² = 5541227028512, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29696 + ... + 29751.

It is an arithmetic number, because the mean of its divisors is an integer number (277424).

2^1664516 is an apocalyptic number.

It is an amenable number.

1664516 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1664516 is a wasteful number, since it uses less digits than its factorization.

1664516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59458 (or 59456 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 1664516 is about 1290.1612302344. The cubic root of 1664516 is about 118.5120902522.

It can be divided in two parts, 16645 and 16, that added together give a palindrome (16661).

The spelling of 1664516 in words is "one million, six hundred sixty-four thousand, five hundred sixteen".