66629253 has 4 divisors (see below), whose sum is σ = 88839008. Its totient is φ = 44419500.

The previous prime is 66629243. The next prime is 66629291. The reversal of 66629253 is 35292666.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 66629253 - 2¹² = 66625157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66629243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11104873 + ... + 11104878.

It is an arithmetic number, because the mean of its divisors is an integer number (22209752).

Almost surely, 2^66629253 is an apocalyptic number.

It is an amenable number.

66629253 is a deficient number, since it is larger than the sum of its proper divisors (22209755).

66629253 is a wasteful number, since it uses less digits than its factorization.

66629253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22209754.

The product of its digits is 116640, while the sum is 39.

The square root of 66629253 is about 8162.6743779230. The cubic root of 66629253 is about 405.4042663515.

The spelling of 66629253 in words is "sixty-six million, six hundred twenty-nine thousand, two hundred fifty-three".