661348803 has 4 divisors (see below), whose sum is σ = 881798408. Its totient is φ = 440899200.

The previous prime is 661348801. The next prime is 661348847. The reversal of 661348803 is 308843166.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 661348803 - 2¹ = 661348801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (661348801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110224798 + ... + 110224803.

It is an arithmetic number, because the mean of its divisors is an integer number (220449602).

Almost surely, 2^661348803 is an apocalyptic number.

661348803 is a deficient number, since it is larger than the sum of its proper divisors (220449605).

661348803 is a wasteful number, since it uses less digits than its factorization.

661348803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220449604.

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 661348803 is about 25716.7028018757. The cubic root of 661348803 is about 871.2514701706.

The spelling of 661348803 in words is "six hundred sixty-one million, three hundred forty-eight thousand, eight hundred three".