1661301416 has 8 divisors (see below), whose sum is σ = 3114940170. Its totient is φ = 830650704.

The previous prime is 1661301371. The next prime is 1661301419. The reversal of 1661301416 is 6141031661.

It can be written as a sum of positive squares in only one way, i.e., 1242280516 + 419020900 = 35246^2 + 20470^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1661301419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103831331 + ... + 103831346.

Almost surely, 2^1661301416 is an apocalyptic number.

It is an amenable number.

1661301416 is a deficient number, since it is larger than the sum of its proper divisors (1453638754).

1661301416 is a wasteful number, since it uses less digits than its factorization.

1661301416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207662683 (or 207662679 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 1661301416 is about 40759.0654456159. The cubic root of 1661301416 is about 1184.3574922594.

The spelling of 1661301416 in words is "one billion, six hundred sixty-one million, three hundred one thousand, four hundred sixteen".