68655877 has 4 divisors (see below), whose sum is σ = 72694476. Its totient is φ = 64617280.

The previous prime is 68655869. The next prime is 68655883. The reversal of 68655877 is 77855686.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77855686 = 2 ⋅38927843.

It can be written as a sum of positive squares in 2 ways, for example, as 63776196 + 4879681 = 7986^2 + 2209^2 .

It is a cyclic number.

It is not a de Polignac number, because 68655877 - 2³ = 68655869 is a prime.

It is a super-3 number, since 3×68655877³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68655827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2019274 + ... + 2019307.

It is an arithmetic number, because the mean of its divisors is an integer number (18173619).

Almost surely, 2^68655877 is an apocalyptic number.

It is an amenable number.

68655877 is a deficient number, since it is larger than the sum of its proper divisors (4038599).

68655877 is a wasteful number, since it uses less digits than its factorization.

68655877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4038598.

The product of its digits is 2822400, while the sum is 52.

The square root of 68655877 is about 8285.8842014597. The cubic root of 68655877 is about 409.4735996752.

The spelling of 68655877 in words is "sixty-eight million, six hundred fifty-five thousand, eight hundred seventy-seven".