1665452040 has 64 divisors (see below), whose sum is σ = 5710124160. Its totient is φ = 380674560.

The previous prime is 1665451993. The next prime is 1665452077. The reversal of 1665452040 is 402545661.

It is a junction number, because it is equal to n+sod(n) for n = 1665451992 and 1665452010.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 990501 + ... + 992180.

It is an arithmetic number, because the mean of its divisors is an integer number (89220690).

Almost surely, 2^1665452040 is an apocalyptic number.

1665452040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1665452040 is an abundant number, since it is smaller than the sum of its proper divisors (4044672120).

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

1665452040 is a wasteful number, since it uses less digits than its factorization.

1665452040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1982702 (or 1982698 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 1665452040 is about 40809.9502572596. The cubic root of 1665452040 is about 1185.3430116705.

The spelling of 1665452040 in words is "one billion, six hundred sixty-five million, four hundred fifty-two thousand, forty".