3665143020 has 384 divisors, whose sum is σ = 13373079552. Its totient is φ = 727833600.

The previous prime is 3665142983. The next prime is 3665143057. The reversal of 3665143020 is 203415663.

It is an interprime number because it is at equal distance from previous prime (3665142983) and next prime (3665143057).

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

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 22485459 + ... + 22485621.

It is an arithmetic number, because the mean of its divisors is an integer number (34825728).

Almost surely, 2^3665143020 is an apocalyptic number.

3665143020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3665143020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6686539776).

3665143020 is an abundant number, since it is smaller than the sum of its proper divisors (9707936532).

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

3665143020 is a wasteful number, since it uses less digits than its factorization.

3665143020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381 (or 379 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 3665143020 is about 60540.4246764094. The cubic root of 3665143020 is about 1541.8080495741.

Adding to 3665143020 its reverse (203415663), we get a palindrome (3868558683).

The spelling of 3665143020 in words is "three billion, six hundred sixty-five million, one hundred forty-three thousand, twenty".