10665138 has 32 divisors (see below), whose sum is σ = 23392512. Its totient is φ = 3214800.

The previous prime is 10665133. The next prime is 10665143. The reversal of 10665138 is 83156601.

10665138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (10665133) and next prime (10665143).

It is a super-2 number, since 2×10665138² = 227490337118088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10665133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18393 + ... + 18963.

It is an arithmetic number, because the mean of its divisors is an integer number (731016).

Almost surely, 2^10665138 is an apocalyptic number.

10665138 is an abundant number, since it is smaller than the sum of its proper divisors (12727374).

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

10665138 is a wasteful number, since it uses less digits than its factorization.

10665138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 10665138 is about 3265.7522869930. The cubic root of 10665138 is about 220.1179670362.

The spelling of 10665138 in words is "ten million, six hundred sixty-five thousand, one hundred thirty-eight".