66673512477 has 128 divisors (see below), whose sum is σ = 120279613440. Its totient is φ = 35948448000.

The previous prime is 66673512469. The next prime is 66673512497. The reversal of 66673512477 is 77421537666.

It is a happy number.

It is not a de Polignac number, because 66673512477 - 2³ = 66673512469 is a prime.

Its product of digits (8890560) is a multiple of the sum of its prime factors (2352).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66673512497) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 33153402 + ... + 33155412.

It is an arithmetic number, because the mean of its divisors is an integer number (939684480).

Almost surely, 2^66673512477 is an apocalyptic number.

It is an amenable number.

66673512477 is a deficient number, since it is larger than the sum of its proper divisors (53606100963).

66673512477 is a wasteful number, since it uses less digits than its factorization.

66673512477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2352 (or 2346 counting only the distinct ones).

The product of its digits is 8890560, while the sum is 54.

The spelling of 66673512477 in words is "sixty-six billion, six hundred seventy-three million, five hundred twelve thousand, four hundred seventy-seven".