68977775 has 6 divisors (see below), whose sum is σ = 85532472. Its totient is φ = 55182200.

The previous prime is 68977729. The next prime is 68977781. The reversal of 68977775 is 57777986.

It is not a de Polignac number, because 68977775 - 2¹² = 68973679 is a prime.

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 68977775.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1379531 + ... + 1379580.

It is an arithmetic number, because the mean of its divisors is an integer number (14255412).

Almost surely, 2^68977775 is an apocalyptic number.

68977775 is a deficient number, since it is larger than the sum of its proper divisors (16554697).

68977775 is a wasteful number, since it uses less digits than its factorization.

68977775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2759121 (or 2759116 counting only the distinct ones).

The product of its digits is 5186160, while the sum is 56.

The square root of 68977775 is about 8305.2859673825. The cubic root of 68977775 is about 410.1125508969.

The spelling of 68977775 in words is "sixty-eight million, nine hundred seventy-seven thousand, seven hundred seventy-five".