1662887879 has 8 divisors (see below), whose sum is σ = 1767928032. Its totient is φ = 1560576160.

The previous prime is 1662887843. The next prime is 1662887899. The reversal of 1662887879 is 9787882661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1662887879 - 2²⁰ = 1661839303 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 (1662887839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 680852 + ... + 683289.

It is an arithmetic number, because the mean of its divisors is an integer number (220991004).

Almost surely, 2^1662887879 is an apocalyptic number.

1662887879 is a deficient number, since it is larger than the sum of its proper divisors (105040153).

1662887879 is a wasteful number, since it uses less digits than its factorization.

1662887879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1364217.

The product of its digits is 16257024, while the sum is 62.

The square root of 1662887879 is about 40778.5222758255. The cubic root of 1662887879 is about 1184.7343738094.

The spelling of 1662887879 in words is "one billion, six hundred sixty-two million, eight hundred eighty-seven thousand, eight hundred seventy-nine".