10661749 has 4 divisors (see below), whose sum is σ = 12184864. Its totient is φ = 9138636.

The previous prime is 10661747. The next prime is 10661773. The reversal of 10661749 is 94716601.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10661749 - 2¹ = 10661747 is a prime.

It is a super-2 number, since 2×10661749² = 227345783478002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10661741) 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, 761547 + ... + 761560.

It is an arithmetic number, because the mean of its divisors is an integer number (3046216).

Almost surely, 2^10661749 is an apocalyptic number.

It is an amenable number.

10661749 is a deficient number, since it is larger than the sum of its proper divisors (1523115).

10661749 is an equidigital number, since it uses as much as digits as its factorization.

10661749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1523114.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 10661749 is about 3265.2333760391. The cubic root of 10661749 is about 220.0946493563.

The spelling of 10661749 in words is "ten million, six hundred sixty-one thousand, seven hundred forty-nine".