661670522 has 16 divisors (see below), whose sum is σ = 1006750080. Its totient is φ = 326105472.

The previous prime is 661670501. The next prime is 661670531. The reversal of 661670522 is 225076166.

661670522 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72554 + ... + 81162.

It is an arithmetic number, because the mean of its divisors is an integer number (62921880).

Almost surely, 2^661670522 is an apocalyptic number.

661670522 is a deficient number, since it is larger than the sum of its proper divisors (345079558).

661670522 is a wasteful number, since it uses less digits than its factorization.

661670522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9157.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 661670522 is about 25722.9571006135. The cubic root of 661670522 is about 871.3927232742.

The spelling of 661670522 in words is "six hundred sixty-one million, six hundred seventy thousand, five hundred twenty-two".