661362098146 has 16 divisors (see below), whose sum is σ = 997039496376. Its totient is φ = 329018535936.

The previous prime is 661362098129. The next prime is 661362098147. The reversal of 661362098146 is 641890263166.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 532154201121 + 129207897025 = 729489^2 + 359455^2 .

It is a junction number, because it is equal to n+sod(n) for n = 661362098093 and 661362098102.

It is not an unprimeable number, because it can be changed into a prime (661362098147) 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, 282801 + ... + 1184356.

Almost surely, 2^661362098146 is an apocalyptic number.

661362098146 is a deficient number, since it is larger than the sum of its proper divisors (335677398230).

661362098146 is a wasteful number, since it uses less digits than its factorization.

661362098146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1468293.

The product of its (nonzero) digits is 2239488, while the sum is 52.

The spelling of 661362098146 in words is "six hundred sixty-one billion, three hundred sixty-two million, ninety-eight thousand, one hundred forty-six".