29720666 has 8 divisors (see below), whose sum is σ = 44654880. Its totient is φ = 14835708.

The previous prime is 29720629. The next prime is 29720683. The reversal of 29720666 is 66602792.

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

It is a super-3 number, since 3×29720666³ (a number of 23 digits) contains 333 as substring.

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, 10766 + ... + 13241.

It is an arithmetic number, because the mean of its divisors is an integer number (5581860).

Almost surely, 2^29720666 is an apocalyptic number.

29720666 is a deficient number, since it is larger than the sum of its proper divisors (14934214).

29720666 is a wasteful number, since it uses less digits than its factorization.

29720666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24628.

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

The square root of 29720666 is about 5451.6663507592. Note that the first 3 decimals coincide. The cubic root of 29720666 is about 309.7558466057.

The spelling of 29720666 in words is "twenty-nine million, seven hundred twenty thousand, six hundred sixty-six".