1430016661 has 4 divisors (see below), whose sum is σ = 1430092300. Its totient is φ = 1429941024.

The previous prime is 1430016631. The next prime is 1430016719. The reversal of 1430016661 is 1666100341.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1666100341 = 1093 ⋅1524337.

It can be written as a sum of positive squares in 2 ways, for example, as 689850225 + 740166436 = 26265^2 + 27206^2 .

It is a cyclic number.

It is not a de Polignac number, because 1430016661 - 2¹³ = 1430008469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1430016611) 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, 18145 + ... + 56473.

It is an arithmetic number, because the mean of its divisors is an integer number (357523075).

Almost surely, 2^1430016661 is an apocalyptic number.

It is an amenable number.

1430016661 is a deficient number, since it is larger than the sum of its proper divisors (75639).

1430016661 is an equidigital number, since it uses as much as digits as its factorization.

1430016661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75638.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 1430016661 is about 37815.5610959298. The cubic root of 1430016661 is about 1126.6275467648.

The spelling of 1430016661 in words is "one billion, four hundred thirty million, sixteen thousand, six hundred sixty-one".