26129966 has 4 divisors (see below), whose sum is σ = 39194952. Its totient is φ = 13064982.

The previous prime is 26129963. The next prime is 26130011. The reversal of 26129966 is 66992162.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×26129966² = 1365550246322312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26129963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6532490 + ... + 6532493.

It is an arithmetic number, because the mean of its divisors is an integer number (9798738).

Almost surely, 2^26129966 is an apocalyptic number.

26129966 is a deficient number, since it is larger than the sum of its proper divisors (13064986).

26129966 is a wasteful number, since it uses less digits than its factorization.

26129966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13064985.

The product of its digits is 69984, while the sum is 41.

The square root of 26129966 is about 5111.7478419813. The cubic root of 26129966 is about 296.7424068423.

The spelling of 26129966 in words is "twenty-six million, one hundred twenty-nine thousand, nine hundred sixty-six".