67770981 has 12 divisors (see below), whose sum is σ = 98034508. Its totient is φ = 45114624.

The previous prime is 67770971. The next prime is 67771001. The reversal of 67770981 is 18907776.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 45360225 + 22410756 = 6735^2 + 4734^2 .

It is not a de Polignac number, because 67770981 - 2¹⁰ = 67769957 is a prime.

It is a super-2 number, since 2×67770981² = 9185811731404722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67770971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1461 + ... + 11733.

Almost surely, 2^67770981 is an apocalyptic number.

It is an amenable number.

67770981 is a deficient number, since it is larger than the sum of its proper divisors (30263527).

67770981 is a wasteful number, since it uses less digits than its factorization.

67770981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11012 (or 11009 counting only the distinct ones).

The product of its (nonzero) digits is 148176, while the sum is 45.

The square root of 67770981 is about 8232.3132229040. The cubic root of 67770981 is about 407.7067709970.

The spelling of 67770981 in words is "sixty-seven million, seven hundred seventy thousand, nine hundred eighty-one".