66733401 has 16 divisors (see below), whose sum is σ = 101821824. Its totient is φ = 38083584.

The previous prime is 66733399. The next prime is 66733409. The reversal of 66733401 is 10433766.

It is not a de Polignac number, because 66733401 - 2¹ = 66733399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66733409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19705 + ... + 22841.

It is an arithmetic number, because the mean of its divisors is an integer number (6363864).

Almost surely, 2^66733401 is an apocalyptic number.

It is an amenable number.

66733401 is a deficient number, since it is larger than the sum of its proper divisors (35088423).

66733401 is a wasteful number, since it uses less digits than its factorization.

66733401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4160.

The product of its (nonzero) digits is 9072, while the sum is 30.

The square root of 66733401 is about 8169.0514137200. The cubic root of 66733401 is about 405.6153851503.

The spelling of 66733401 in words is "sixty-six million, seven hundred thirty-three thousand, four hundred one".