74009666 has 4 divisors (see below), whose sum is σ = 111014502. Its totient is φ = 37004832.

The previous prime is 74009651. The next prime is 74009707. The reversal of 74009666 is 66690047.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 54834025 + 19175641 = 7405^2 + 4379^2 .

It is a super-2 number, since 2×74009666² = 10954861322863112, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18502415 + ... + 18502418.

Almost surely, 2^74009666 is an apocalyptic number.

74009666 is a deficient number, since it is larger than the sum of its proper divisors (37004836).

74009666 is a wasteful number, since it uses less digits than its factorization.

74009666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37004835.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 74009666 is about 8602.8870735353. The cubic root of 74009666 is about 419.8519243688.

The spelling of 74009666 in words is "seventy-four million, nine thousand, six hundred sixty-six".