1026662005 has 4 divisors (see below), whose sum is σ = 1231994412. Its totient is φ = 821329600.

The previous prime is 1026662003. The next prime is 1026662041. The reversal of 1026662005 is 5002666201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5002666201 = 13 ⋅384820477.

It can be written as a sum of positive squares in 2 ways, for example, as 713584369 + 313077636 = 26713^2 + 17694^2 .

It is not a de Polignac number, because 1026662005 - 2¹ = 1026662003 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 (1026662003) 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, 102666196 + ... + 102666205.

It is an arithmetic number, because the mean of its divisors is an integer number (307998603).

Almost surely, 2^1026662005 is an apocalyptic number.

It is an amenable number.

1026662005 is a deficient number, since it is larger than the sum of its proper divisors (205332407).

1026662005 is an equidigital number, since it uses as much as digits as its factorization.

1026662005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205332406.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 1026662005 is about 32041.5668312272. The cubic root of 1026662005 is about 1008.8094998191.

The spelling of 1026662005 in words is "one billion, twenty-six million, six hundred sixty-two thousand, five".