72916668 has 36 divisors (see below), whose sum is σ = 201074328. Its totient is φ = 22095840.

The previous prime is 72916667. The next prime is 72916729. The reversal of 72916668 is 86661927.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72916667) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91671 + ... + 92462.

It is an arithmetic number, because the mean of its divisors is an integer number (5585398).

Almost surely, 2^72916668 is an apocalyptic number.

It is an amenable number.

72916668 is an abundant number, since it is smaller than the sum of its proper divisors (128157660).

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

72916668 is a wasteful number, since it uses less digits than its factorization.

72916668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184154 (or 184149 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 72916668 is about 8539.1257163717. The cubic root of 72916668 is about 417.7748304602.

The spelling of 72916668 in words is "seventy-two million, nine hundred sixteen thousand, six hundred sixty-eight".