66777706671074 has 48 divisors (see below), whose sum is σ = 119676660694272. Its totient is φ = 27843859566432.

The previous prime is 66777706671047. The next prime is 66777706671083. The reversal of 66777706671074 is 47017660777766.

It is a super-3 number, since 3×66777706671074³ (a number of 42 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66777706670989 and 66777706671007.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60833309 + ... + 61921295.

It is an arithmetic number, because the mean of its divisors is an integer number (2493263764464).

Almost surely, 2^{66777706671074} is an apocalyptic number.

66777706671074 is a deficient number, since it is larger than the sum of its proper divisors (52898954023198).

66777706671074 is a wasteful number, since it uses less digits than its factorization.

66777706671074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1104967 (or 1104960 counting only the distinct ones).

The product of its (nonzero) digits is 609892416, while the sum is 71.

The spelling of 66777706671074 in words is "sixty-six trillion, seven hundred seventy-seven billion, seven hundred six million, six hundred seventy-one thousand, seventy-four".