660206402 has 16 divisors (see below), whose sum is σ = 1036808640. Its totient is φ = 314878032.

The previous prime is 660206399. The next prime is 660206461. The reversal of 660206402 is 204602066.

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, 63758 + ... + 73385.

It is an arithmetic number, because the mean of its divisors is an integer number (64800540).

Almost surely, 2^660206402 is an apocalyptic number.

660206402 is a deficient number, since it is larger than the sum of its proper divisors (376602238).

660206402 is a wasteful number, since it uses less digits than its factorization.

660206402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137257.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 660206402 is about 25694.4819367895. The cubic root of 660206402 is about 870.7495201181.

Adding to 660206402 its reverse (204602066), we get a palindrome (864808468).

The spelling of 660206402 in words is "six hundred sixty million, two hundred six thousand, four hundred two".