1665413310 has 128 divisors (see below), whose sum is σ = 4525424640. Its totient is φ = 388598400.

The previous prime is 1665413297. The next prime is 1665413311. The reversal of 1665413310 is 133145661.

It is a super-2 number, since 2×1665413310² = 5547202986250312200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665413311) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2690181 + ... + 2690799.

It is an arithmetic number, because the mean of its divisors is an integer number (35354880).

Almost surely, 2^1665413310 is an apocalyptic number.

1665413310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1665413310, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2262712320).

1665413310 is an abundant number, since it is smaller than the sum of its proper divisors (2860011330).

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

1665413310 is a wasteful number, since it uses less digits than its factorization.

1665413310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 1665413310 is about 40809.4757378724. The cubic root of 1665413310 is about 1185.3338232360. Note that the first 3 decimals are identical.

Adding to 1665413310 its reverse (133145661), we get a palindrome (1798558971).

The spelling of 1665413310 in words is "one billion, six hundred sixty-five million, four hundred thirteen thousand, three hundred ten".