2664060642640 has 40 divisors (see below), whose sum is σ = 6194164126248. Its totient is φ = 1065585868800.

The previous prime is 2664060642619. The next prime is 2664060642757. The reversal of 2664060642640 is 462460604662.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13272883264 + 2650787759376 = 115208^2 + 1628124^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1689040 + ... + 2860240.

Almost surely, 2^{2664060642640} is an apocalyptic number.

2664060642640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2664060642640 is an abundant number, since it is smaller than the sum of its proper divisors (3530103483608).

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

2664060642640 is a wasteful number, since it uses less digits than its factorization.

2664060642640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1199647 (or 1199641 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 46.

The spelling of 2664060642640 in words is "two trillion, six hundred sixty-four billion, sixty million, six hundred forty-two thousand, six hundred forty".