11661078 has 32 divisors (see below), whose sum is σ = 27401472. Its totient is φ = 3261600.

The previous prime is 11661073. The next prime is 11661101. The reversal of 11661078 is 87016611.

It is a happy number.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11661073) 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, 5938 + ... + 7653.

It is an arithmetic number, because the mean of its divisors is an integer number (856296).

Almost surely, 2^11661078 is an apocalyptic number.

11661078 is an abundant number, since it is smaller than the sum of its proper divisors (15740394).

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

11661078 is a wasteful number, since it uses less digits than its factorization.

11661078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13620.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 11661078 is about 3414.8320602923. The cubic root of 11661078 is about 226.7668496973.

Adding to 11661078 its reverse (87016611), we get a palindrome (98677689).

The spelling of 11661078 in words is "eleven million, six hundred sixty-one thousand, seventy-eight".