78346966501 has 4 divisors (see below), whose sum is σ = 78350075104. Its totient is φ = 78343857900.

The previous prime is 78346966421. The next prime is 78346966517. The reversal of 78346966501 is 10566964387.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 78346966501 - 2²¹ = 78344869349 is a prime.

It is a super-2 number, since 2×78346966501² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78346966001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1516185 + ... + 1567006.

It is an arithmetic number, because the mean of its divisors is an integer number (19587518776).

Almost surely, 2^78346966501 is an apocalyptic number.

It is an amenable number.

78346966501 is a deficient number, since it is larger than the sum of its proper divisors (3108603).

78346966501 is a wasteful number, since it uses less digits than its factorization.

78346966501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3108602.

The product of its (nonzero) digits is 6531840, while the sum is 55.

The spelling of 78346966501 in words is "seventy-eight billion, three hundred forty-six million, nine hundred sixty-six thousand, five hundred one".