661436146 has 16 divisors (see below), whose sum is σ = 1140229440. Its totient is φ = 281887920.

The previous prime is 661436143. The next prime is 661436177. The reversal of 661436146 is 641634166.

It is not an unprimeable number, because it can be changed into a prime (661436143) 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, 129465 + ... + 134476.

It is an arithmetic number, because the mean of its divisors is an integer number (71264340).

Almost surely, 2^661436146 is an apocalyptic number.

661436146 is a deficient number, since it is larger than the sum of its proper divisors (478793294).

661436146 is a wasteful number, since it uses less digits than its factorization.

661436146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264129.

The product of its digits is 62208, while the sum is 37.

The square root of 661436146 is about 25718.4009222969. The cubic root of 661436146 is about 871.2898232893.

The spelling of 661436146 in words is "six hundred sixty-one million, four hundred thirty-six thousand, one hundred forty-six".