661433465 has 32 divisors (see below), whose sum is σ = 991872000. Its totient is φ = 411364800.

The previous prime is 661433449. The next prime is 661433489. The reversal of 661433465 is 564334166.

It is not a de Polignac number, because 661433465 - 2⁴ = 661433449 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 187286 + ... + 190784.

It is an arithmetic number, because the mean of its divisors is an integer number (30996000).

Almost surely, 2^661433465 is an apocalyptic number.

It is an amenable number.

661433465 is a deficient number, since it is larger than the sum of its proper divisors (330438535).

661433465 is a wasteful number, since it uses less digits than its factorization.

661433465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4013.

The product of its digits is 155520, while the sum is 38.

The square root of 661433465 is about 25718.3488000299. The cubic root of 661433465 is about 871.2886460877.

The spelling of 661433465 in words is "six hundred sixty-one million, four hundred thirty-three thousand, four hundred sixty-five".