67601645 has 6 divisors (see below), whose sum is σ = 81144042. Its totient is φ = 54066608.

The previous prime is 67601629. The next prime is 67601663. The reversal of 67601645 is 54610676.

It can be written as a sum of positive squares in 3 ways, for example, as 24186724 + 43414921 = 4918^2 + 6589^2 .

It is not a de Polignac number, because 67601645 - 2⁴ = 67601629 is a prime.

It is a super-3 number, since 3×67601645³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16547 + ... + 20223.

It is an arithmetic number, because the mean of its divisors is an integer number (13524007).

Almost surely, 2^67601645 is an apocalyptic number.

It is an amenable number.

67601645 is a deficient number, since it is larger than the sum of its proper divisors (13542397).

67601645 is an frugal number, since it uses more digits than its factorization.

67601645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7359 (or 3682 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 67601645 is about 8222.0219532667. The cubic root of 67601645 is about 407.3669155283.

The spelling of 67601645 in words is "sixty-seven million, six hundred one thousand, six hundred forty-five".