1201660004 has 12 divisors (see below), whose sum is σ = 2118034800. Its totient is φ = 596507208.

The previous prime is 1201659971. The next prime is 1201660007. The reversal of 1201660004 is 4000661021.

It is a happy number.

It is a super-4 number, since 4×1201660004⁴ (a number of 37 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (1201660007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1080074 + ... + 1081185.

It is an arithmetic number, because the mean of its divisors is an integer number (176502900).

Almost surely, 2^1201660004 is an apocalyptic number.

It is an amenable number.

1201660004 is a deficient number, since it is larger than the sum of its proper divisors (916374796).

1201660004 is a wasteful number, since it uses less digits than its factorization.

1201660004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2161402 (or 2161400 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1201660004 is about 34664.9679647912. The cubic root of 1201660004 is about 1063.1483482632.

The spelling of 1201660004 in words is "one billion, two hundred one million, six hundred sixty thousand, four".