7385261666640 has 320 divisors, whose sum is σ = 27163130948352. Its totient is φ = 1636282368000.

The previous prime is 7385261666633. The next prime is 7385261666647. The reversal of 7385261666640 is 466661625837.

It is an interprime number because it is at equal distance from previous prime (7385261666633) and next prime (7385261666647).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7385261666647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2401032 + ... + 4531608.

Almost surely, 2^{7385261666640} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7385261666640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13581565474176).

7385261666640 is an abundant number, since it is smaller than the sum of its proper divisors (19777869281712).

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

7385261666640 is a wasteful number, since it uses less digits than its factorization.

7385261666640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2130718 (or 2130712 counting only the distinct ones).

The product of its (nonzero) digits is 52254720, while the sum is 60.

The spelling of 7385261666640 in words is "seven trillion, three hundred eighty-five billion, two hundred sixty-one million, six hundred sixty-six thousand, six hundred forty".