67740977 has 2 divisors, whose sum is σ = 67740978. Its totient is φ = 67740976.

The previous prime is 67740973. The next prime is 67740989. The reversal of 67740977 is 77904776.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60855601 + 6885376 = 7801^2 + 2624^2 .

It is a cyclic number.

It is not a de Polignac number, because 67740977 - 2² = 67740973 is a prime.

It is not a weakly prime, because it can be changed into another prime (67740973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33870488 + 33870489.

It is an arithmetic number, because the mean of its divisors is an integer number (33870489).

Almost surely, 2^67740977 is an apocalyptic number.

It is an amenable number.

67740977 is a deficient number, since it is larger than the sum of its proper divisors (1).

67740977 is an equidigital number, since it uses as much as digits as its factorization.

67740977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 518616, while the sum is 47.

The square root of 67740977 is about 8230.4906901108. The cubic root of 67740977 is about 407.6465946034.

The spelling of 67740977 in words is "sixty-seven million, seven hundred forty thousand, nine hundred seventy-seven".