1665263406030 has 384 divisors, whose sum is σ = 4861146960000. Its totient is φ = 363579310080.

The previous prime is 1665263405989. The next prime is 1665263406041. The reversal of 1665263406030 is 306043625661.

It is a happy number.

It is a super-2 number, since 2×1665263406030² (a number of 25 digits) contains 22 as substring.

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

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 191 ways as a sum of consecutive naturals, for example, 2597914510 + ... + 2597915150.

It is an arithmetic number, because the mean of its divisors is an integer number (12659236875).

Almost surely, 2^{1665263406030} is an apocalyptic number.

1665263406030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1665263406030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2430573480000).

1665263406030 is an abundant number, since it is smaller than the sum of its proper divisors (3195883553970).

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

1665263406030 is a wasteful number, since it uses less digits than its factorization.

1665263406030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1252 (or 1245 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 42.

The spelling of 1665263406030 in words is "one trillion, six hundred sixty-five billion, two hundred sixty-three million, four hundred six thousand, thirty".