1662108026 has 4 divisors (see below), whose sum is σ = 2493162042. Its totient is φ = 831054012.

The previous prime is 1662108023. The next prime is 1662108067. The reversal of 1662108026 is 6208012661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6208012661 = 10667 ⋅581983.

It can be written as a sum of positive squares in only one way, i.e., 1559065225 + 103042801 = 39485^2 + 10151^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1662107983 and 1662108001.

It is not an unprimeable number, because it can be changed into a prime (1662108023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415527005 + ... + 415527008.

Almost surely, 2^1662108026 is an apocalyptic number.

1662108026 is a deficient number, since it is larger than the sum of its proper divisors (831054016).

1662108026 is an equidigital number, since it uses as much as digits as its factorization.

1662108026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831054015.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 1662108026 is about 40768.9590988046. The cubic root of 1662108026 is about 1184.5491412117.

The spelling of 1662108026 in words is "one billion, six hundred sixty-two million, one hundred eight thousand, twenty-six".