1661412346 has 16 divisors (see below), whose sum is σ = 2878597440. Its totient is φ = 710764480.

The previous prime is 1661412331. The next prime is 1661412367. The reversal of 1661412346 is 6432141661.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2220766 + ... + 2221513.

It is an arithmetic number, because the mean of its divisors is an integer number (179912340).

Almost surely, 2^1661412346 is an apocalyptic number.

1661412346 is a deficient number, since it is larger than the sum of its proper divisors (1217185094).

1661412346 is a wasteful number, since it uses less digits than its factorization.

1661412346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4442309.

The product of its digits is 20736, while the sum is 34.

The square root of 1661412346 is about 40760.4262244643. The cubic root of 1661412346 is about 1184.3838526880.

The spelling of 1661412346 in words is "one billion, six hundred sixty-one million, four hundred twelve thousand, three hundred forty-six".