11661007 has 4 divisors (see below), whose sum is σ = 11881080. Its totient is φ = 11440936.

The previous prime is 11660993. The next prime is 11661011. The reversal of 11661007 is 70016611.

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

It is a cyclic number.

It is not a de Polignac number, because 11661007 - 2⁷ = 11660879 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11661037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109957 + ... + 110062.

It is an arithmetic number, because the mean of its divisors is an integer number (2970270).

Almost surely, 2^11661007 is an apocalyptic number.

11661007 is a deficient number, since it is larger than the sum of its proper divisors (220073).

11661007 is an equidigital number, since it uses as much as digits as its factorization.

11661007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220072.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 11661007 is about 3414.8216644504. The cubic root of 11661007 is about 226.7663894631.

Adding to 11661007 its reverse (70016611), we get a palindrome (81677618).

The spelling of 11661007 in words is "eleven million, six hundred sixty-one thousand, seven".