68198669 has 16 divisors (see below), whose sum is σ = 85862400. Its totient is φ = 52619760.

The previous prime is 68198639. The next prime is 68198707. The reversal of 68198669 is 96689186.

It is a cyclic number.

It is not a de Polignac number, because 68198669 - 2⁸ = 68198413 is a prime.

It is a super-2 number, since 2×68198669² = 9302116906743122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68198669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68198629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3632 + ... + 12230.

It is an arithmetic number, because the mean of its divisors is an integer number (5366400).

Almost surely, 2^68198669 is an apocalyptic number.

It is an amenable number.

68198669 is a deficient number, since it is larger than the sum of its proper divisors (17663731).

68198669 is a wasteful number, since it uses less digits than its factorization.

68198669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8720.

The product of its digits is 1119744, while the sum is 53.

The square root of 68198669 is about 8258.2485431234. The cubic root of 68198669 is about 408.5626228923.

The spelling of 68198669 in words is "sixty-eight million, one hundred ninety-eight thousand, six hundred sixty-nine".