66223407 has 8 divisors (see below), whose sum is σ = 88583040. Its totient is φ = 44006360.

The previous prime is 66223393. The next prime is 66223411. The reversal of 66223407 is 70432266.

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

It is a cyclic number.

It is not a de Polignac number, because 66223407 - 2⁶ = 66223343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66223427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34557 + ... + 36422.

It is an arithmetic number, because the mean of its divisors is an integer number (11072880).

Almost surely, 2^66223407 is an apocalyptic number.

66223407 is a deficient number, since it is larger than the sum of its proper divisors (22359633).

66223407 is a wasteful number, since it uses less digits than its factorization.

66223407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71293.

The product of its (nonzero) digits is 12096, while the sum is 30.

The square root of 66223407 is about 8137.7765390799. The cubic root of 66223407 is about 404.5794689958.

The spelling of 66223407 in words is "sixty-six million, two hundred twenty-three thousand, four hundred seven".