661051411 has 8 divisors (see below), whose sum is σ = 669360384. Its totient is φ = 652773120.

The previous prime is 661051387. The next prime is 661051453. The reversal of 661051411 is 114150166.

661051411 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 661051411 - 2¹³ = 661043219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (661051481) 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, 37326 + ... + 52108.

It is an arithmetic number, because the mean of its divisors is an integer number (83670048).

Almost surely, 2^661051411 is an apocalyptic number.

661051411 is a deficient number, since it is larger than the sum of its proper divisors (8308973).

661051411 is a wasteful number, since it uses less digits than its factorization.

661051411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15341.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 661051411 is about 25710.9200729962. The cubic root of 661051411 is about 871.1208572660.

The spelling of 661051411 in words is "six hundred sixty-one million, fifty-one thousand, four hundred eleven".