1659867466 has 4 divisors (see below), whose sum is σ = 2489801202. Its totient is φ = 829933732.

The previous prime is 1659867439. The next prime is 1659867481. The reversal of 1659867466 is 6647689561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6647689561 = 3389 ⋅1961549.

It can be written as a sum of positive squares in only one way, i.e., 1607609025 + 52258441 = 40095^2 + 7229^2 .

It is a super-2 number, since 2×1659867466² = 5510320009370522312, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1659867466.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 414966865 + ... + 414966868.

Almost surely, 2^1659867466 is an apocalyptic number.

1659867466 is a deficient number, since it is larger than the sum of its proper divisors (829933736).

1659867466 is an equidigital number, since it uses as much as digits as its factorization.

1659867466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829933735.

The product of its digits is 13063680, while the sum is 58.

The square root of 1659867466 is about 40741.4710829150. The cubic root of 1659867466 is about 1184.0166353313.

The spelling of 1659867466 in words is "one billion, six hundred fifty-nine million, eight hundred sixty-seven thousand, four hundred sixty-six".