10661351 has 4 divisors (see below), whose sum is σ = 11124912. Its totient is φ = 10197792.

The previous prime is 10661347. The next prime is 10661369. The reversal of 10661351 is 15316601.

It is a happy number.

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 10661351 - 2² = 10661347 is a prime.

It is a super-2 number, since 2×10661351² = 227328810290402, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 463537 = 10661351 / (1 + 0 + 6 + 6 + 1 + 3 + 5 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10661311) 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, 231746 + ... + 231791.

It is an arithmetic number, because the mean of its divisors is an integer number (2781228).

Almost surely, 2^10661351 is an apocalyptic number.

10661351 is a deficient number, since it is larger than the sum of its proper divisors (463561).

10661351 is an equidigital number, since it uses as much as digits as its factorization.

10661351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463560.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 10661351 is about 3265.1724303626. The cubic root of 10661351 is about 220.0919106324.

Adding to 10661351 its reverse (15316601), we get a palindrome (25977952).

The spelling of 10661351 in words is "ten million, six hundred sixty-one thousand, three hundred fifty-one".