68660477 has 2 divisors, whose sum is σ = 68660478. Its totient is φ = 68660476.

The previous prime is 68660453. The next prime is 68660491. The reversal of 68660477 is 77406686.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51179716 + 17480761 = 7154^2 + 4181^2 .

It is a cyclic number.

It is not a de Polignac number, because 68660477 - 2¹⁸ = 68398333 is a prime.

It is a super-2 number, since 2×68660477² = 9428522203735058, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68660407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34330238 + 34330239.

It is an arithmetic number, because the mean of its divisors is an integer number (34330239).

Almost surely, 2^68660477 is an apocalyptic number.

It is an amenable number.

68660477 is a deficient number, since it is larger than the sum of its proper divisors (1).

68660477 is an equidigital number, since it uses as much as digits as its factorization.

68660477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 338688, while the sum is 44.

The square root of 68660477 is about 8286.1617773249. The cubic root of 68660477 is about 409.4827444931.

The spelling of 68660477 in words is "sixty-eight million, six hundred sixty thousand, four hundred seventy-seven".