66676473 has 16 divisors (see below), whose sum is σ = 99973440. Its totient is φ = 43913952.

The previous prime is 66676469. The next prime is 66676501. The reversal of 66676473 is 37467666.

It is not a de Polignac number, because 66676473 - 2² = 66676469 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66676403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12636 + ... + 17117.

It is an arithmetic number, because the mean of its divisors is an integer number (6248340).

Almost surely, 2^66676473 is an apocalyptic number.

It is an amenable number.

66676473 is a deficient number, since it is larger than the sum of its proper divisors (33296967).

66676473 is a wasteful number, since it uses less digits than its factorization.

66676473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29845 (or 29839 counting only the distinct ones).

The product of its digits is 762048, while the sum is 45.

The square root of 66676473 is about 8165.5663000186. The cubic root of 66676473 is about 405.5000134302.

The spelling of 66676473 in words is "sixty-six million, six hundred seventy-six thousand, four hundred seventy-three".