3997066500 has 480 divisors, whose sum is σ = 15576777216. Its totient is φ = 872467200.

The previous prime is 3997066483. The next prime is 3997066519. The reversal of 3997066500 is 56607993.

3997066500 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 an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 6520194 + ... + 6520806.

Almost surely, 2^3997066500 is an apocalyptic number.

3997066500 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 3997066500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7788388608).

3997066500 is an abundant number, since it is smaller than the sum of its proper divisors (11579710716).

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

3997066500 is a wasteful number, since it uses less digits than its factorization.

3997066500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674 (or 653 counting only the distinct ones).

The product of its (nonzero) digits is 306180, while the sum is 45.

The square root of 3997066500 is about 63222.3575960277. The cubic root of 3997066500 is about 1587.0129036511.

The spelling of 3997066500 in words is "three billion, nine hundred ninety-seven million, sixty-six thousand, five hundred".