3957018660 has 288 divisors, whose sum is σ = 14661104640. Its totient is φ = 843727104.

The previous prime is 3957018649. The next prime is 3957018661. The reversal of 3957018660 is 668107593.

It is a happy number.

3957018660 is a `hidden beast` number, since 3 + 9 + 570 + 18 + 6 + 60 = 666.

3957018660 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (3957018661) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1602747 + ... + 1605213.

Almost surely, 2^3957018660 is an apocalyptic number.

3957018660 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 3957018660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7330552320).

3957018660 is an abundant number, since it is smaller than the sum of its proper divisors (10704085980).

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

3957018660 is a wasteful number, since it uses less digits than its factorization.

3957018660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2575 (or 2570 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 3957018660 is about 62904.8381287163. The cubic root of 3957018660 is about 1581.6948458407.

The spelling of 3957018660 in words is "three billion, nine hundred fifty-seven million, eighteen thousand, six hundred sixty".