801666740 has 24 divisors (see below), whose sum is σ = 1924000512. Its totient is φ = 274857120.

The previous prime is 801666731. The next prime is 801666743. The reversal of 801666740 is 47666108.

It is a junction number, because it is equal to n+sod(n) for n = 801666694 and 801666703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (801666743) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2862956 + ... + 2863235.

It is an arithmetic number, because the mean of its divisors is an integer number (80166688).

Almost surely, 2^801666740 is an apocalyptic number.

It is an amenable number.

801666740 is an abundant number, since it is smaller than the sum of its proper divisors (1122333772).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

801666740 is a wasteful number, since it uses less digits than its factorization.

801666740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5726207 (or 5726205 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 801666740 is about 28313.7199957900. The cubic root of 801666740 is about 928.9620129976.

The spelling of 801666740 in words is "eight hundred one million, six hundred sixty-six thousand, seven hundred forty".