67561006 has 4 divisors (see below), whose sum is σ = 101341512. Its totient is φ = 33780502.

The previous prime is 67561003. The next prime is 67561007. The reversal of 67561006 is 60016576.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67561003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16890250 + ... + 16890253.

It is an arithmetic number, because the mean of its divisors is an integer number (25335378).

Almost surely, 2^67561006 is an apocalyptic number.

67561006 is the 5199-th centered pentagonal number.

67561006 is a deficient number, since it is larger than the sum of its proper divisors (33780506).

67561006 is a wasteful number, since it uses less digits than its factorization.

67561006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33780505.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 67561006 is about 8219.5502310041. The cubic root of 67561006 is about 407.2852690804.

The spelling of 67561006 in words is "sixty-seven million, five hundred sixty-one thousand, six".