67701681 has 6 divisors (see below), whose sum is σ = 97791330. Its totient is φ = 45134448.

The previous prime is 67701661. The next prime is 67701703. The reversal of 67701681 is 18610776.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 35892081 + 31809600 = 5991^2 + 5640^2 .

It is not a de Polignac number, because 67701681 - 2⁵ = 67701649 is a prime.

It is a super-2 number, since 2×67701681² = 9167035220451522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (67701661) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3761196 + ... + 3761213.

It is an arithmetic number, because the mean of its divisors is an integer number (16298555).

Almost surely, 2^67701681 is an apocalyptic number.

It is an amenable number.

67701681 is a deficient number, since it is larger than the sum of its proper divisors (30089649).

67701681 is a wasteful number, since it uses less digits than its factorization.

67701681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7522415 (or 7522412 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 67701681 is about 8228.1031228346. The cubic root of 67701681 is about 407.5677551783.

The spelling of 67701681 in words is "sixty-seven million, seven hundred one thousand, six hundred eighty-one".