666838407202 has 16 divisors (see below), whose sum is σ = 1091214415872. Its totient is φ = 303101618320.

The previous prime is 666838407181. The next prime is 666838407211. The reversal of 666838407202 is 202704838666.

It is a super-2 number, since 2×666838407202² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 666838407202.

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, 751188 + ... + 1377664.

It is an arithmetic number, because the mean of its divisors is an integer number (68200900992).

Almost surely, 2^666838407202 is an apocalyptic number.

666838407202 is a deficient number, since it is larger than the sum of its proper divisors (424376008670).

666838407202 is a wasteful number, since it uses less digits than its factorization.

666838407202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674873.

The product of its (nonzero) digits is 4644864, while the sum is 52.

The spelling of 666838407202 in words is "six hundred sixty-six billion, eight hundred thirty-eight million, four hundred seven thousand, two hundred two".