67121670651 has 16 divisors (see below), whose sum is σ = 102300601344. Its totient is φ = 38347755264.

The previous prime is 67121670647. The next prime is 67121670703. The reversal of 67121670651 is 15607612176.

It is not a de Polignac number, because 67121670651 - 2² = 67121670647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (67121670601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200790 + ... + 417803.

It is an arithmetic number, because the mean of its divisors is an integer number (6393787584).

Almost surely, 2^67121670651 is an apocalyptic number.

67121670651 is a deficient number, since it is larger than the sum of its proper divisors (35178930693).

67121670651 is a wasteful number, since it uses less digits than its factorization.

67121670651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623770.

The product of its (nonzero) digits is 105840, while the sum is 42.

The spelling of 67121670651 in words is "sixty-seven billion, one hundred twenty-one million, six hundred seventy thousand, six hundred fifty-one".