72426668 has 6 divisors (see below), whose sum is σ = 126746676. Its totient is φ = 36213332.

The previous prime is 72426667. The next prime is 72426709. The reversal of 72426668 is 86662427.

It is not an unprimeable number, because it can be changed into a prime (72426661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9053330 + ... + 9053337.

It is an arithmetic number, because the mean of its divisors is an integer number (21124446).

Almost surely, 2^72426668 is an apocalyptic number.

It is an amenable number.

72426668 is a deficient number, since it is larger than the sum of its proper divisors (54320008).

72426668 is a wasteful number, since it uses less digits than its factorization.

72426668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18106671 (or 18106669 counting only the distinct ones).

The product of its digits is 193536, while the sum is 41.

The square root of 72426668 is about 8510.3858901932. The cubic root of 72426668 is about 416.8369107690.

The spelling of 72426668 in words is "seventy-two million, four hundred twenty-six thousand, six hundred sixty-eight".