1201616668 has 24 divisors (see below), whose sum is σ = 2480758784. Its totient is φ = 498366000.

The previous prime is 1201616621. The next prime is 1201616681. The reversal of 1201616668 is 8666161021.

It is a congruent number.

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, 691308 + ... + 693043.

Almost surely, 2^1201616668 is an apocalyptic number.

It is an amenable number.

1201616668 is an abundant number, since it is smaller than the sum of its proper divisors (1279142116).

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

1201616668 is a wasteful number, since it uses less digits than its factorization.

1201616668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1384393 (or 1384391 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 1201616668 is about 34664.3428900650. The cubic root of 1201616668 is about 1063.1355678454.

Adding to 1201616668 its reverse (8666161021), we get a palindrome (9867777689).

The spelling of 1201616668 in words is "one billion, two hundred one million, six hundred sixteen thousand, six hundred sixty-eight".