1664605602 has 24 divisors (see below), whose sum is σ = 3934522800. Its totient is φ = 504425880.

The previous prime is 1664605601. The next prime is 1664605633. The reversal of 1664605602 is 2065064661.

It is a happy number.

1664605602 is a `hidden beast` number, since 1 + 6 + 6 + 46 + 0 + 5 + 602 = 666.

It is not an unprimeable number, because it can be changed into a prime (1664605601) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4203352 + ... + 4203747.

It is an arithmetic number, because the mean of its divisors is an integer number (163938450).

Almost surely, 2^1664605602 is an apocalyptic number.

1664605602 is an abundant number, since it is smaller than the sum of its proper divisors (2269917198).

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

1664605602 is a wasteful number, since it uses less digits than its factorization.

1664605602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8407118 (or 8407115 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 1664605602 is about 40799.5784537046. The cubic root of 1664605602 is about 1185.1421674221.

The spelling of 1664605602 in words is "one billion, six hundred sixty-four million, six hundred five thousand, six hundred two".