2489922666 has 320 divisors, whose sum is σ = 7386660864. Its totient is φ = 608083200.

The previous prime is 2489922653. The next prime is 2489922671. The reversal of 2489922666 is 6662299842.

It is a happy number.

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

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, 18174550 + ... + 18174686.

Almost surely, 2^2489922666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2489922666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3693330432).

2489922666 is an abundant number, since it is smaller than the sum of its proper divisors (4896738198).

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

2489922666 is a wasteful number, since it uses less digits than its factorization.

2489922666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247 (or 238 counting only the distinct ones).

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

The square root of 2489922666 is about 49899.1249021463. The cubic root of 2489922666 is about 1355.3827463211.

The spelling of 2489922666 in words is "two billion, four hundred eighty-nine million, nine hundred twenty-two thousand, six hundred sixty-six".