2660293440 has 168 divisors, whose sum is σ = 10457566080. Its totient is φ = 608062464.

The previous prime is 2660293409. The next prime is 2660293463. The reversal of 2660293440 is 443920662.

2660293440 is a `hidden beast` number, since 2 + 6 + 602 + 9 + 3 + 4 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (168).

It is a super-2 number, since 2×2660293440² = 14154322373814067200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2660293395 and 2660293404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45820 + ... + 86139.

Almost surely, 2^2660293440 is an apocalyptic number.

2660293440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2660293440 is an abundant number, since it is smaller than the sum of its proper divisors (7797272640).

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

2660293440 is a wasteful number, since it uses less digits than its factorization.

2660293440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131989 (or 131976 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 2660293440 is about 51578.0325332404. The cubic root of 2660293440 is about 1385.6169302975.

The spelling of 2660293440 in words is "two billion, six hundred sixty million, two hundred ninety-three thousand, four hundred forty".