1661050026 has 12 divisors (see below), whose sum is σ = 3598941762. Its totient is φ = 553683336.

The previous prime is 1661050021. The next prime is 1661050031. The reversal of 1661050026 is 6200501661.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1661050021) and next prime (1661050031).

It can be written as a sum of positive squares in only one way, i.e., 1204159401 + 456890625 = 34701^2 + 21375^2 .

It is not an unprimeable number, because it can be changed into a prime (1661050021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 46140261 + ... + 46140296.

Almost surely, 2^1661050026 is an apocalyptic number.

1661050026 is an abundant number, since it is smaller than the sum of its proper divisors (1937891736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1661050026 is a wasteful number, since it uses less digits than its factorization.

1661050026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92280565 (or 92280562 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 1661050026 is about 40755.9814751160. The cubic root of 1661050026 is about 1184.2977498096.

Adding to 1661050026 its reverse (6200501661), we get a palindrome (7861551687).

The spelling of 1661050026 in words is "one billion, six hundred sixty-one million, fifty thousand, twenty-six".