67613657 has 4 divisors (see below), whose sum is σ = 68146176. Its totient is φ = 67081140.

The previous prime is 67613603. The next prime is 67613669. The reversal of 67613657 is 75631676.

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 67613657 - 2⁶ = 67613593 is a prime.

It is a super-2 number, since 2×67613657² = 9143213225827298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67613677) 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, 266069 + ... + 266322.

It is an arithmetic number, because the mean of its divisors is an integer number (17036544).

Almost surely, 2^67613657 is an apocalyptic number.

It is an amenable number.

67613657 is a deficient number, since it is larger than the sum of its proper divisors (532519).

67613657 is a wasteful number, since it uses less digits than its factorization.

67613657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532518.

The product of its digits is 158760, while the sum is 41.

The square root of 67613657 is about 8222.7523980721. The cubic root of 67613657 is about 407.3910421680.

The spelling of 67613657 in words is "sixty-seven million, six hundred thirteen thousand, six hundred fifty-seven".