26610661 has 32 divisors (see below), whose sum is σ = 36391680. Its totient is φ = 18816000.

The previous prime is 26610641. The next prime is 26610667. The reversal of 26610661 is 16601662.

It is not a de Polignac number, because 26610661 - 2⁵ = 26610629 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 (26610667) 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 31 ways as a sum of consecutive naturals, for example, 37611 + ... + 38311.

It is an arithmetic number, because the mean of its divisors is an integer number (1137240).

Almost surely, 2^26610661 is an apocalyptic number.

It is an amenable number.

26610661 is a deficient number, since it is larger than the sum of its proper divisors (9781019).

26610661 is a wasteful number, since it uses less digits than its factorization.

26610661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 26610661 is about 5158.5522193732. The cubic root of 26610661 is about 298.5510164602.

The spelling of 26610661 in words is "twenty-six million, six hundred ten thousand, six hundred sixty-one".