1121666451 has 8 divisors (see below), whose sum is σ = 1496571024. Its totient is φ = 747269760.

The previous prime is 1121666431. The next prime is 1121666473. The reversal of 1121666451 is 1546661211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1121666451 - 2⁹ = 1121665939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1121666431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121786 + ... + 130671.

It is an arithmetic number, because the mean of its divisors is an integer number (187071378).

Almost surely, 2^1121666451 is an apocalyptic number.

1121666451 is a deficient number, since it is larger than the sum of its proper divisors (374904573).

1121666451 is a wasteful number, since it uses less digits than its factorization.

1121666451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253941.

The product of its digits is 8640, while the sum is 33.

The square root of 1121666451 is about 33491.2891809199. The cubic root of 1121666451 is about 1039.0136268528.

The spelling of 1121666451 in words is "one billion, one hundred twenty-one million, six hundred sixty-six thousand, four hundred fifty-one".