1664242360 has 32 divisors (see below), whose sum is σ = 4084959600. Its totient is φ = 605178880.

The previous prime is 1664242339. The next prime is 1664242381. The reversal of 1664242360 is 632424661.

It is an interprime number because it is at equal distance from previous prime (1664242339) and next prime (1664242381).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1890745 + ... + 1891624.

Almost surely, 2^1664242360 is an apocalyptic number.

1664242360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1664242360 is an abundant number, since it is smaller than the sum of its proper divisors (2420717240).

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

1664242360 is a wasteful number, since it uses less digits than its factorization.

1664242360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3782391 (or 3782387 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 1664242360 is about 40795.1266697384. The cubic root of 1664242360 is about 1185.0559558639.

The spelling of 1664242360 in words is "one billion, six hundred sixty-four million, two hundred forty-two thousand, three hundred sixty".