1660264253 has 4 divisors (see below), whose sum is σ = 1668956928. Its totient is φ = 1651571580.

The previous prime is 1660264247. The next prime is 1660264279. The reversal of 1660264253 is 3524620661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3524620661 = 14153 ⋅249037.

It is a cyclic number.

It is not a de Polignac number, because 1660264253 - 2¹² = 1660260157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660204253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4346051 + ... + 4346432.

It is an arithmetic number, because the mean of its divisors is an integer number (417239232).

Almost surely, 2^1660264253 is an apocalyptic number.

It is an amenable number.

1660264253 is a deficient number, since it is larger than the sum of its proper divisors (8692675).

1660264253 is an equidigital number, since it uses as much as digits as its factorization.

1660264253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8692674.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 1660264253 is about 40746.3403632768. The cubic root of 1660264253 is about 1184.1109731802.

The spelling of 1660264253 in words is "one billion, six hundred sixty million, two hundred sixty-four thousand, two hundred fifty-three".