1660348087 has 4 divisors (see below), whose sum is σ = 1688489640. Its totient is φ = 1632206536.

The previous prime is 1660348069. The next prime is 1660348139. The reversal of 1660348087 is 7808430661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1660348087 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 (1660348007) 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, 14070688 + ... + 14070805.

It is an arithmetic number, because the mean of its divisors is an integer number (422122410).

Almost surely, 2^1660348087 is an apocalyptic number.

1660348087 is a deficient number, since it is larger than the sum of its proper divisors (28141553).

1660348087 is an equidigital number, since it uses as much as digits as its factorization.

1660348087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28141552.

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 1660348087 is about 40747.3690807149. The cubic root of 1660348087 is about 1184.1309031579.

The spelling of 1660348087 in words is "one billion, six hundred sixty million, three hundred forty-eight thousand, eighty-seven".