78148681660678 has 16 divisors (see below), whose sum is σ = 122637059342784. Its totient is φ = 37310216463040.

The previous prime is 78148681660649. The next prime is 78148681660697. The reversal of 78148681660678 is 87606618684187.

It is a super-2 number, since 2×78148681660678² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10138641925 + ... + 10138649632.

It is an arithmetic number, because the mean of its divisors is an integer number (7664816208924).

Almost surely, 2^{78148681660678} is an apocalyptic number.

78148681660678 is a deficient number, since it is larger than the sum of its proper divisors (44488377682106).

78148681660678 is a wasteful number, since it uses less digits than its factorization.

78148681660678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20277291647.

The product of its (nonzero) digits is 1040449536, while the sum is 76.

The spelling of 78148681660678 in words is "seventy-eight trillion, one hundred forty-eight billion, six hundred eighty-one million, six hundred sixty thousand, six hundred seventy-eight".