68677551 has 10 divisors (see below), whose sum is σ = 102592512. Its totient is φ = 45784980.

The previous prime is 68677547. The next prime is 68677573. The reversal of 68677551 is 15577686.

It is not a de Polignac number, because 68677551 - 2² = 68677547 is a prime.

It is a super-2 number, since 2×68677551² = 9433212022715202, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 68677497 and 68677506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68677541) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 423855 + ... + 424016.

Almost surely, 2^68677551 is an apocalyptic number.

68677551 is a deficient number, since it is larger than the sum of its proper divisors (33914961).

68677551 is an equidigital number, since it uses as much as digits as its factorization.

68677551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847883 (or 847874 counting only the distinct ones).

The product of its digits is 352800, while the sum is 45.

The square root of 68677551 is about 8287.1919852264. The cubic root of 68677551 is about 409.5166841007.

The spelling of 68677551 in words is "sixty-eight million, six hundred seventy-seven thousand, five hundred fifty-one".