68646740 has 24 divisors (see below), whose sum is σ = 144850272. Its totient is φ = 27326880.

The previous prime is 68646733. The next prime is 68646749. The reversal of 68646740 is 4764686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68646749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3914 + ... + 12353.

It is an arithmetic number, because the mean of its divisors is an integer number (6035428).

Almost surely, 2^68646740 is an apocalyptic number.

It is an amenable number.

68646740 is an abundant number, since it is smaller than the sum of its proper divisors (76203532).

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

68646740 is a wasteful number, since it uses less digits than its factorization.

68646740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16487 (or 16485 counting only the distinct ones).

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

The square root of 68646740 is about 8285.3328237313. The cubic root of 68646740 is about 409.4554340719.

The spelling of 68646740 in words is "sixty-eight million, six hundred forty-six thousand, seven hundred forty".