1665000061560 has 192 divisors, whose sum is σ = 5907005002080. Its totient is φ = 403374981120.

The previous prime is 1665000061471. The next prime is 1665000061561. The reversal of 1665000061560 is 651600005661.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665000061561) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6014512 + ... + 6285248.

Almost surely, 2^{1665000061560} is an apocalyptic number.

1665000061560 is a gapful number since it is divisible by the number (10) 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 1665000061560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2953502501040).

1665000061560 is an abundant number, since it is smaller than the sum of its proper divisors (4242004940520).

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

1665000061560 is a wasteful number, since it uses less digits than its factorization.

1665000061560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272318 (or 272311 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The spelling of 1665000061560 in words is "one trillion, six hundred sixty-five billion, sixty-one thousand, five hundred sixty".