661032445 has 8 divisors (see below), whose sum is σ = 794499840. Its totient is φ = 527985360.

The previous prime is 661032413. The next prime is 661032457. The reversal of 661032445 is 544230166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 661032445 - 2⁵ = 661032413 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101605 + ... + 107914.

It is an arithmetic number, because the mean of its divisors is an integer number (99312480).

Almost surely, 2^661032445 is an apocalyptic number.

It is an amenable number.

661032445 is a deficient number, since it is larger than the sum of its proper divisors (133467395).

661032445 is a wasteful number, since it uses less digits than its factorization.

661032445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210155.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 661032445 is about 25710.5512387424. The cubic root of 661032445 is about 871.1125261762.

The spelling of 661032445 in words is "six hundred sixty-one million, thirty-two thousand, four hundred forty-five".