67727761 has 4 divisors (see below), whose sum is σ = 71292400. Its totient is φ = 64163124.

The previous prime is 67727749. The next prime is 67727767. The reversal of 67727761 is 16772776.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 67727761 - 2⁵ = 67727729 is a prime.

It is a super-2 number, since 2×67727761² = 9174099220146242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67727767) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1782291 + ... + 1782328.

It is an arithmetic number, because the mean of its divisors is an integer number (17823100).

Almost surely, 2^67727761 is an apocalyptic number.

It is an amenable number.

67727761 is a deficient number, since it is larger than the sum of its proper divisors (3564639).

67727761 is a wasteful number, since it uses less digits than its factorization.

67727761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3564638.

The product of its digits is 172872, while the sum is 43.

The square root of 67727761 is about 8229.6877826562. The cubic root of 67727761 is about 407.6200827932.

The spelling of 67727761 in words is "sixty-seven million, seven hundred twenty-seven thousand, seven hundred sixty-one".