742117668 has 12 divisors (see below), whose sum is σ = 1731607920. Its totient is φ = 247372552.

The previous prime is 742117657. The next prime is 742117687. The reversal of 742117668 is 866711247.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30921558 + ... + 30921581.

It is an arithmetic number, because the mean of its divisors is an integer number (144300660).

Almost surely, 2^742117668 is an apocalyptic number.

It is an amenable number.

742117668 is an abundant number, since it is smaller than the sum of its proper divisors (989490252).

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

742117668 is a wasteful number, since it uses less digits than its factorization.

742117668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61843146 (or 61843144 counting only the distinct ones).

The product of its digits is 112896, while the sum is 42.

The square root of 742117668 is about 27241.8367222183. The cubic root of 742117668 is about 905.3661585199.

The spelling of 742117668 in words is "seven hundred forty-two million, one hundred seventeen thousand, six hundred sixty-eight".