1664536830 has 64 divisors (see below), whose sum is σ = 4362771456. Its totient is φ = 403088000.

The previous prime is 1664536823. The next prime is 1664536831. The reversal of 1664536830 is 386354661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664536831) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 387595 + ... + 391865.

It is an arithmetic number, because the mean of its divisors is an integer number (68168304).

Almost surely, 2^1664536830 is an apocalyptic number.

1664536830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1664536830 is an abundant number, since it is smaller than the sum of its proper divisors (2698234626).

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

1664536830 is a wasteful number, since it uses less digits than its factorization.

1664536830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5473.

The product of its (nonzero) digits is 311040, while the sum is 42.

The square root of 1664536830 is about 40798.7356421740. The cubic root of 1664536830 is about 1185.1258460946.

The spelling of 1664536830 in words is "one billion, six hundred sixty-four million, five hundred thirty-six thousand, eight hundred thirty".