2015840666070 has 1024 divisors, whose sum is σ = 7412207616000. Its totient is φ = 384925685760.

The previous prime is 2015840665961. The next prime is 2015840666093. The reversal of 2015840666070 is 706660485102.

It is a super-2 number, since 2×2015840666070² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

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 511 ways as a sum of consecutive naturals, for example, 744675657 + ... + 744678363.

It is an arithmetic number, because the mean of its divisors is an integer number (7238484000).

Almost surely, 2^{2015840666070} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2015840666070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3706103808000).

2015840666070 is an abundant number, since it is smaller than the sum of its proper divisors (5396366949930).

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

2015840666070 is a wasteful number, since it uses less digits than its factorization.

2015840666070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2815 (or 2795 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 2015840666070 in words is "two trillion, fifteen billion, eight hundred forty million, six hundred sixty-six thousand, seventy".