67664762641 has 8 divisors (see below), whose sum is σ = 77616514304. Its totient is φ = 57784350240.

The previous prime is 67664762621. The next prime is 67664762687. The reversal of 67664762641 is 14626746676.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 67664762641 - 2¹³ = 67664754449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (67664762611) 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, 17832780 + ... + 17836573.

It is an arithmetic number, because the mean of its divisors is an integer number (9702064288).

Almost surely, 2^67664762641 is an apocalyptic number.

It is an amenable number.

67664762641 is a deficient number, since it is larger than the sum of its proper divisors (9951751663).

67664762641 is a wasteful number, since it uses less digits than its factorization.

67664762641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35669631.

The product of its digits is 12192768, while the sum is 55.

The spelling of 67664762641 in words is "sixty-seven billion, six hundred sixty-four million, seven hundred sixty-two thousand, six hundred forty-one".