67400740657 has 8 divisors (see below), whose sum is σ = 71033954400. Its totient is φ = 63776107584.

The previous prime is 67400740621. The next prime is 67400740663. The reversal of 67400740657 is 75604700476.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 67400740657 - 2⁷ = 67400740529 is a prime.

It is a super-2 number, since 2×67400740657² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67400740457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2129032 + ... + 2160457.

It is an arithmetic number, because the mean of its divisors is an integer number (8879244300).

Almost surely, 2^67400740657 is an apocalyptic number.

It is an amenable number.

67400740657 is a deficient number, since it is larger than the sum of its proper divisors (3633213743).

67400740657 is a wasteful number, since it uses less digits than its factorization.

67400740657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4290335.

The product of its (nonzero) digits is 987840, while the sum is 46.

The spelling of 67400740657 in words is "sixty-seven billion, four hundred million, seven hundred forty thousand, six hundred fifty-seven".