67642957 has 4 divisors (see below), whose sum is σ = 67748800. Its totient is φ = 67537116.

The previous prime is 67642951. The next prime is 67642963. The reversal of 67642957 is 75924676.

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 an interprime number because it is at equal distance from previous prime (67642951) and next prime (67642963).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67642957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67642951) 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, 51957 + ... + 53242.

It is an arithmetic number, because the mean of its divisors is an integer number (16937200).

Almost surely, 2^67642957 is an apocalyptic number.

It is an amenable number.

67642957 is a deficient number, since it is larger than the sum of its proper divisors (105843).

67642957 is a wasteful number, since it uses less digits than its factorization.

67642957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105842.

The product of its digits is 635040, while the sum is 46.

The square root of 67642957 is about 8224.5338469727. The cubic root of 67642957 is about 407.4498805460.

The spelling of 67642957 in words is "sixty-seven million, six hundred forty-two thousand, nine hundred fifty-seven".