661007476 has 6 divisors (see below), whose sum is σ = 1156763090. Its totient is φ = 330503736.

The previous prime is 661007401. The next prime is 661007497. The reversal of 661007476 is 674700166.

661007476 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 558187876 + 102819600 = 23626^2 + 10140^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82625931 + ... + 82625938.

Almost surely, 2^661007476 is an apocalyptic number.

It is an amenable number.

661007476 is a deficient number, since it is larger than the sum of its proper divisors (495755614).

661007476 is a wasteful number, since it uses less digits than its factorization.

661007476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165251873 (or 165251871 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 661007476 is about 25710.0656553032. The cubic root of 661007476 is about 871.1015579387.

The spelling of 661007476 in words is "six hundred sixty-one million, seven thousand, four hundred seventy-six".