65960026440 has 256 divisors, whose sum is σ = 246903552000. Its totient is φ = 13695098880.

The previous prime is 65960026427. The next prime is 65960026463. The reversal of 65960026440 is 4462006956.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 65960026392 and 65960026401.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 17452471 + ... + 17456249.

It is an arithmetic number, because the mean of its divisors is an integer number (964467000).

Almost surely, 2^65960026440 is an apocalyptic number.

65960026440 is a gapful number since it is divisible by the number (60) 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 65960026440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123451776000).

65960026440 is an abundant number, since it is smaller than the sum of its proper divisors (180943525560).

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

65960026440 is a wasteful number, since it uses less digits than its factorization.

65960026440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5700 (or 5696 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 65960026440 in words is "sixty-five billion, nine hundred sixty million, twenty-six thousand, four hundred forty".