4020651660 has 96 divisors (see below), whose sum is σ = 11655447552. Its totient is φ = 1034933760.

The previous prime is 4020651647. The next prime is 4020651683. The reversal of 4020651660 is 661560204.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 196095 + ... + 215625.

It is an arithmetic number, because the mean of its divisors is an integer number (121410912).

Almost surely, 2^4020651660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4020651660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5827723776).

4020651660 is an abundant number, since it is smaller than the sum of its proper divisors (7634795892).

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

4020651660 is a wasteful number, since it uses less digits than its factorization.

4020651660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19663 (or 19661 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 4020651660 is about 63408.6087215293. The cubic root of 4020651660 is about 1590.1282361665.

The spelling of 4020651660 in words is "four billion, twenty million, six hundred fifty-one thousand, six hundred sixty".