66206974 has 4 divisors (see below), whose sum is σ = 99310464. Its totient is φ = 33103486.

The previous prime is 66206969. The next prime is 66206981. The reversal of 66206974 is 47960266.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47960266 = 2 ⋅23980133.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16551742 + ... + 16551745.

It is an arithmetic number, because the mean of its divisors is an integer number (24827616).

Almost surely, 2^66206974 is an apocalyptic number.

66206974 is a deficient number, since it is larger than the sum of its proper divisors (33103490).

66206974 is a wasteful number, since it uses less digits than its factorization.

66206974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33103489.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 66206974 is about 8136.7668026065. The cubic root of 66206974 is about 404.5460014515.

The spelling of 66206974 in words is "sixty-six million, two hundred six thousand, nine hundred seventy-four".