66497674 has 8 divisors (see below), whose sum is σ = 99991620. Its totient is φ = 33167136.

The previous prime is 66497653. The next prime is 66497699. The reversal of 66497674 is 47679466.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 66308449 + 189225 = 8143^2 + 435^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39829 + ... + 41464.

Almost surely, 2^66497674 is an apocalyptic number.

66497674 is a deficient number, since it is larger than the sum of its proper divisors (33493946).

66497674 is a wasteful number, since it uses less digits than its factorization.

66497674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81704.

The product of its digits is 1524096, while the sum is 49.

The square root of 66497674 is about 8154.6105976926. The cubic root of 66497674 is about 405.1372272872.

The spelling of 66497674 in words is "sixty-six million, four hundred ninety-seven thousand, six hundred seventy-four".