661182003 has 36 divisors (see below), whose sum is σ = 1019812248. Its totient is φ = 412700160.

The previous prime is 661181999. The next prime is 661182013. The reversal of 661182003 is 300281166.

It is not a de Polignac number, because 661182003 - 2² = 661181999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (661182013) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 605488 + ... + 606578.

It is an arithmetic number, because the mean of its divisors is an integer number (28328118).

Almost surely, 2^661182003 is an apocalyptic number.

661182003 is a deficient number, since it is larger than the sum of its proper divisors (358630245).

661182003 is a wasteful number, since it uses less digits than its factorization.

661182003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1364 (or 1344 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 661182003 is about 25713.4595688717. The cubic root of 661182003 is about 871.1782173658.

It can be divided in two parts, 66118 and 2003, that added together give a square (68121 = 261²).

The spelling of 661182003 in words is "six hundred sixty-one million, one hundred eighty-two thousand, three".