2664699840 has 504 divisors, whose sum is σ = 10597914288. Its totient is φ = 609361920.

The previous prime is 2664699823. The next prime is 2664699853. The reversal of 2664699840 is 489964662.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 11436364 + ... + 11436596.

Almost surely, 2^2664699840 is an apocalyptic number.

2664699840 is a gapful number since it is divisible by the number (20) 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 2664699840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5298957144).

2664699840 is an abundant number, since it is smaller than the sum of its proper divisors (7933214448).

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

2664699840 is a wasteful number, since it uses less digits than its factorization.

2664699840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305 (or 273 counting only the distinct ones).

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

The square root of 2664699840 is about 51620.7307193534. The cubic root of 2664699840 is about 1386.3815344870.

The spelling of 2664699840 in words is "two billion, six hundred sixty-four million, six hundred ninety-nine thousand, eight hundred forty".