1665720002152 has 16 divisors (see below), whose sum is σ = 3123445954500. Its totient is φ = 832801080960.

The previous prime is 1665720002119. The next prime is 1665720002213. The reversal of 1665720002152 is 2512000275661.

It can be written as a sum of positive squares in 2 ways, for example, as 1652988490596 + 12731511556 = 1285686^2 + 112834^2 .

It is a super-2 number, since 2×1665720002152² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7244749 + ... + 7471132.

Almost surely, 2^{1665720002152} is an apocalyptic number.

It is an amenable number.

1665720002152 is a deficient number, since it is larger than the sum of its proper divisors (1457725952348).

1665720002152 is a wasteful number, since it uses less digits than its factorization.

1665720002152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14730036 (or 14730032 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 37.

The spelling of 1665720002152 in words is "one trillion, six hundred sixty-five billion, seven hundred twenty million, two thousand, one hundred fifty-two".