1665495879 has 16 divisors (see below), whose sum is σ = 2241216384. Its totient is φ = 1100080800.

The previous prime is 1665495877. The next prime is 1665495913. The reversal of 1665495879 is 9785945661.

It is not a de Polignac number, because 1665495879 - 2¹ = 1665495877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665495877) 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, 268497 + ... + 274629.

It is an arithmetic number, because the mean of its divisors is an integer number (140076024).

Almost surely, 2^1665495879 is an apocalyptic number.

1665495879 is a deficient number, since it is larger than the sum of its proper divisors (575720505).

1665495879 is a wasteful number, since it uses less digits than its factorization.

1665495879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6958.

The product of its digits is 16329600, while the sum is 60.

The square root of 1665495879 is about 40810.4873653820. The cubic root of 1665495879 is about 1185.3534120093.

The spelling of 1665495879 in words is "one billion, six hundred sixty-five million, four hundred ninety-five thousand, eight hundred seventy-nine".