1664337730 has 32 divisors (see below), whose sum is σ = 3410252928. Its totient is φ = 578899200.

The previous prime is 1664337713. The next prime is 1664337733. The reversal of 1664337730 is 377334661.

It is not an unprimeable number, because it can be changed into a prime (1664337733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 326391 + ... + 331450.

It is an arithmetic number, because the mean of its divisors is an integer number (106570404).

Almost surely, 2^1664337730 is an apocalyptic number.

1664337730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1664337730 is an abundant number, since it is smaller than the sum of its proper divisors (1745915198).

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

1664337730 is a wasteful number, since it uses less digits than its factorization.

1664337730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657882.

The product of its (nonzero) digits is 190512, while the sum is 40.

The square root of 1664337730 is about 40796.2955426102. The cubic root of 1664337730 is about 1185.0785921158.

The spelling of 1664337730 in words is "one billion, six hundred sixty-four million, three hundred thirty-seven thousand, seven hundred thirty".