67479561 has 20 divisors (see below), whose sum is σ = 101053392. Its totient is φ = 44874648.

The previous prime is 67479557. The next prime is 67479571. The reversal of 67479561 is 16597476.

It is a happy number.

It is not a de Polignac number, because 67479561 - 2² = 67479557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (67479571) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 43546 + ... + 45068.

Almost surely, 2^67479561 is an apocalyptic number.

It is an amenable number.

67479561 is a deficient number, since it is larger than the sum of its proper divisors (33573831).

67479561 is a wasteful number, since it uses less digits than its factorization.

67479561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2082 (or 2073 counting only the distinct ones).

The product of its digits is 317520, while the sum is 45.

The square root of 67479561 is about 8214.5943904736. The cubic root of 67479561 is about 407.1215420578.

The spelling of 67479561 in words is "sixty-seven million, four hundred seventy-nine thousand, five hundred sixty-one".