67660740820 has 24 divisors (see below), whose sum is σ = 148265276544. Its totient is φ = 25887587616.

The previous prime is 67660740781. The next prime is 67660740839. The reversal of 67660740820 is 2804706676.

It is a super-2 number, since 2×67660740820² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73543824 + ... + 73544743.

It is an arithmetic number, because the mean of its divisors is an integer number (6177719856).

Almost surely, 2^67660740820 is an apocalyptic number.

It is an amenable number.

67660740820 is an abundant number, since it is smaller than the sum of its proper divisors (80604535724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

67660740820 is a wasteful number, since it uses less digits than its factorization.

67660740820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147088599 (or 147088597 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 46.

The spelling of 67660740820 in words is "sixty-seven billion, six hundred sixty million, seven hundred forty thousand, eight hundred twenty".