68667534 has 64 divisors (see below), whose sum is σ = 170049600. Its totient is φ = 20393856.

The previous prime is 68667491. The next prime is 68667541. The reversal of 68667534 is 43576686.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 68667534.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18672 + ... + 22044.

It is an arithmetic number, because the mean of its divisors is an integer number (2657025).

Almost surely, 2^68667534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68667534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85024800).

68667534 is an abundant number, since it is smaller than the sum of its proper divisors (101382066).

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

68667534 is a wasteful number, since it uses less digits than its factorization.

68667534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3426 (or 3420 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 68667534 is about 8286.5875968338. The cubic root of 68667534 is about 409.4967730428.

It can be divided in two parts, 6866 and 7534, that added together give a square (14400 = 120²).

The spelling of 68667534 in words is "sixty-eight million, six hundred sixty-seven thousand, five hundred thirty-four".