1661445346 has 16 divisors (see below), whose sum is σ = 2725201728. Its totient is φ = 753404400.

The previous prime is 1661445307. The next prime is 1661445353. The reversal of 1661445346 is 6435441661.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1661445299 and 1661445308.

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, 80430 + ... + 98953.

It is an arithmetic number, because the mean of its divisors is an integer number (170325108).

Almost surely, 2^1661445346 is an apocalyptic number.

1661445346 is a deficient number, since it is larger than the sum of its proper divisors (1063756382).

1661445346 is a wasteful number, since it uses less digits than its factorization.

1661445346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179817.

The product of its digits is 207360, while the sum is 40.

The square root of 1661445346 is about 40760.8310268571. The cubic root of 1661445346 is about 1184.3916942911.

The spelling of 1661445346 in words is "one billion, six hundred sixty-one million, four hundred forty-five thousand, three hundred forty-six".