661063602 has 16 divisors (see below), whose sum is σ = 1323492192. Its totient is φ = 220127040.

The previous prime is 661063583. The next prime is 661063619. The reversal of 661063602 is 206360166.

It is a self number, because there is not a number n which added to its sum of digits gives 661063602.

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, 50524 + ... + 62247.

It is an arithmetic number, because the mean of its divisors is an integer number (82718262).

Almost surely, 2^661063602 is an apocalyptic number.

661063602 is an abundant number, since it is smaller than the sum of its proper divisors (662428590).

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

661063602 is a wasteful number, since it uses less digits than its factorization.

661063602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113753.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 661063602 is about 25711.1571501556. The cubic root of 661063602 is about 871.1262122550.

The spelling of 661063602 in words is "six hundred sixty-one million, sixty-three thousand, six hundred two".