661673050 has 24 divisors (see below), whose sum is σ = 1256901696. Its totient is φ = 259037040.

The previous prime is 661673029. The next prime is 661673053. The reversal of 661673050 is 50376166.

It is a happy number.

It is a super-2 number, since 2×661673050² = 875622450192605000, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 661672997 and 661673015.

It is not an unprimeable number, because it can be changed into a prime (661673053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 138432 + ... + 143131.

It is an arithmetic number, because the mean of its divisors is an integer number (52370904).

Almost surely, 2^661673050 is an apocalyptic number.

661673050 is a deficient number, since it is larger than the sum of its proper divisors (595228646).

661673050 is a wasteful number, since it uses less digits than its factorization.

661673050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281622 (or 281617 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 661673050 is about 25723.0062395514. The cubic root of 661673050 is about 871.3938330299.

The spelling of 661673050 in words is "six hundred sixty-one million, six hundred seventy-three thousand, fifty".