3664441998 has 64 divisors (see below), whose sum is σ = 9379921920. Its totient is φ = 1038725856.

The previous prime is 3664441993. The next prime is 3664442003. The reversal of 3664441998 is 8991444663.

It is a happy number.

3664441998 is a `hidden beast` number, since 3 + 6 + 6 + 444 + 199 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (3664441993) and next prime (3664442003).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3664441993) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9840 + ... + 86172.

It is an arithmetic number, because the mean of its divisors is an integer number (146561280).

Almost surely, 2^3664441998 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3664441998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4689960960).

3664441998 is an abundant number, since it is smaller than the sum of its proper divisors (5715479922).

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

3664441998 is a wasteful number, since it uses less digits than its factorization.

3664441998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76478 (or 76472 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 54.

The square root of 3664441998 is about 60534.6346978323. The cubic root of 3664441998 is about 1541.7097441533.

The spelling of 3664441998 in words is "three billion, six hundred sixty-four million, four hundred forty-one thousand, nine hundred ninety-eight".