1664351610 has 32 divisors (see below), whose sum is σ = 3997226880. Its totient is φ = 443517888.

The previous prime is 1664351609. The next prime is 1664351617. The reversal of 1664351610 is 161534661.

It is not an unprimeable number, because it can be changed into a prime (1664351617) 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, 26211 + ... + 63369.

It is an arithmetic number, because the mean of its divisors is an integer number (124913340).

Almost surely, 2^1664351610 is an apocalyptic number.

1664351610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1664351610 is an abundant number, since it is smaller than the sum of its proper divisors (2332875270).

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

1664351610 is a wasteful number, since it uses less digits than its factorization.

1664351610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38662.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 1664351610 is about 40796.4656557403. The cubic root of 1664351610 is about 1185.0818864882.

The spelling of 1664351610 in words is "one billion, six hundred sixty-four million, three hundred fifty-one thousand, six hundred ten".