1665752297 has 16 divisors (see below), whose sum is σ = 1839201984. Its totient is φ = 1496040000.

The previous prime is 1665752273. The next prime is 1665752329. The reversal of 1665752297 is 7922575661.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1665752297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1665752227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 606347 + ... + 609087.

It is an arithmetic number, because the mean of its divisors is an integer number (114950124).

Almost surely, 2^1665752297 is an apocalyptic number.

It is an amenable number.

1665752297 is a deficient number, since it is larger than the sum of its proper divisors (173449687).

1665752297 is a wasteful number, since it uses less digits than its factorization.

1665752297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3400.

The product of its digits is 1587600, while the sum is 50.

The square root of 1665752297 is about 40813.6288144046. The cubic root of 1665752297 is about 1185.4142408107.

The spelling of 1665752297 in words is "one billion, six hundred sixty-five million, seven hundred fifty-two thousand, two hundred ninety-seven".