68776631 has 16 divisors (see below), whose sum is σ = 88516608. Its totient is φ = 51861600.

The previous prime is 68776627. The next prime is 68776649. The reversal of 68776631 is 13667786.

It is a happy number.

It is not a de Polignac number, because 68776631 - 2² = 68776627 is a prime.

It is a super-2 number, since 2×68776631² = 9460449943420322, which contains 22 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 (68776231) 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, 12020 + ... + 16793.

It is an arithmetic number, because the mean of its divisors is an integer number (5532288).

Almost surely, 2^68776631 is an apocalyptic number.

68776631 is a deficient number, since it is larger than the sum of its proper divisors (19739977).

68776631 is a wasteful number, since it uses less digits than its factorization.

68776631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28862.

The product of its digits is 254016, while the sum is 44.

The square root of 68776631 is about 8293.1677301258. The cubic root of 68776631 is about 409.7135238532.

The spelling of 68776631 in words is "sixty-eight million, seven hundred seventy-six thousand, six hundred thirty-one".