66698474 has 16 divisors (see below), whose sum is σ = 106342080. Its totient is φ = 31285440.

The previous prime is 66698473. The next prime is 66698477. The reversal of 66698474 is 47489666.

It is not an unprimeable number, because it can be changed into a prime (66698473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4607 + ... + 12434.

It is an arithmetic number, because the mean of its divisors is an integer number (6646380).

Almost surely, 2^66698474 is an apocalyptic number.

66698474 is a deficient number, since it is larger than the sum of its proper divisors (39643606).

66698474 is a wasteful number, since it uses less digits than its factorization.

66698474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17165.

The product of its digits is 1741824, while the sum is 50.

The square root of 66698474 is about 8166.9133704234. The cubic root of 66698474 is about 405.5446089940.

The spelling of 66698474 in words is "sixty-six million, six hundred ninety-eight thousand, four hundred seventy-four".