2664490387860 has 288 divisors, whose sum is σ = 9585157720320. Its totient is φ = 608635358208.

The previous prime is 2664490387763. The next prime is 2664490387877. The reversal of 2664490387860 is 687830944662.

2664490387860 is a `hidden beast` number, since 2 + 6 + 6 + 4 + 490 + 3 + 87 + 8 + 60 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 54713842 + ... + 54762518.

It is an arithmetic number, because the mean of its divisors is an integer number (33281797640).

Almost surely, 2^{2664490387860} is an apocalyptic number.

2664490387860 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 2664490387860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4792578860160).

2664490387860 is an abundant number, since it is smaller than the sum of its proper divisors (6920667332460).

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

2664490387860 is a wasteful number, since it uses less digits than its factorization.

2664490387860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50317 (or 50303 counting only the distinct ones).

The product of its (nonzero) digits is 83607552, while the sum is 63.

The spelling of 2664490387860 in words is "two trillion, six hundred sixty-four billion, four hundred ninety million, three hundred eighty-seven thousand, eight hundred sixty".