67640630 has 16 divisors (see below), whose sum is σ = 122197680. Its totient is φ = 26957472.

The previous prime is 67640579. The next prime is 67640633. The reversal of 67640630 is 3604676.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67640633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9440 + ... + 14979.

It is an arithmetic number, because the mean of its divisors is an integer number (7637355).

Almost surely, 2^67640630 is an apocalyptic number.

67640630 is a deficient number, since it is larger than the sum of its proper divisors (54557050).

67640630 is a wasteful number, since it uses less digits than its factorization.

67640630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24703.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 67640630 is about 8224.3923787718. The cubic root of 67640630 is about 407.4452082353.

The spelling of 67640630 in words is "sixty-seven million, six hundred forty thousand, six hundred thirty".