68422661 has 4 divisors (see below), whose sum is σ = 68575500. Its totient is φ = 68269824.

The previous prime is 68422649. The next prime is 68422703. The reversal of 68422661 is 16622486.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16622486 = 2 ⋅8311243.

It can be written as a sum of positive squares in 2 ways, for example, as 58997761 + 9424900 = 7681^2 + 3070^2 .

It is a cyclic number.

It is not a de Polignac number, because 68422661 - 2²⁶ = 1313797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68422621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75746 + ... + 76643.

It is an arithmetic number, because the mean of its divisors is an integer number (17143875).

Almost surely, 2^68422661 is an apocalyptic number.

It is an amenable number.

68422661 is a deficient number, since it is larger than the sum of its proper divisors (152839).

68422661 is a wasteful number, since it uses less digits than its factorization.

68422661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152838.

The product of its digits is 27648, while the sum is 35.

The square root of 68422661 is about 8271.7991392441. The cubic root of 68422661 is about 409.0094290264.

The spelling of 68422661 in words is "sixty-eight million, four hundred twenty-two thousand, six hundred sixty-one".