661501202 has 16 divisors (see below), whose sum is σ = 1020684672. Its totient is φ = 321403920.

The previous prime is 661501201. The next prime is 661501237. The reversal of 661501202 is 202105166.

It is not an unprimeable number, because it can be changed into a prime (661501201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22538 + ... + 42789.

It is an arithmetic number, because the mean of its divisors is an integer number (63792792).

Almost surely, 2^661501202 is an apocalyptic number.

661501202 is a deficient number, since it is larger than the sum of its proper divisors (359183470).

661501202 is a wasteful number, since it uses less digits than its factorization.

661501202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65473.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 661501202 is about 25719.6656665673. The cubic root of 661501202 is about 871.3183877863.

Adding to 661501202 its reverse (202105166), we get a palindrome (863606368).

The spelling of 661501202 in words is "six hundred sixty-one million, five hundred one thousand, two hundred two".