1334668721 has 8 divisors (see below), whose sum is σ = 1356398784. Its totient is φ = 1313020240.

The previous prime is 1334668717. The next prime is 1334668723. The reversal of 1334668721 is 1278664331.

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

It is a cyclic number.

It is not a de Polignac number, because 1334668721 - 2² = 1334668717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1334668723) 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, 13031 + ... + 53283.

It is an arithmetic number, because the mean of its divisors is an integer number (169549848).

Almost surely, 2^1334668721 is an apocalyptic number.

It is an amenable number.

1334668721 is a deficient number, since it is larger than the sum of its proper divisors (21730063).

1334668721 is an equidigital number, since it uses as much as digits as its factorization.

1334668721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40791.

The product of its digits is 145152, while the sum is 41.

The square root of 1334668721 is about 36533.1181395730. The cubic root of 1334668721 is about 1101.0097397727.

The spelling of 1334668721 in words is "one billion, three hundred thirty-four million, six hundred sixty-eight thousand, seven hundred twenty-one".