66672255 has 32 divisors (see below), whose sum is σ = 115577280. Its totient is φ = 32624640.

The previous prime is 66672241. The next prime is 66672259. The reversal of 66672255 is 55227666.

It is not a de Polignac number, because 66672255 - 2⁵ = 66672223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66672259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34351 + ... + 36239.

It is an arithmetic number, because the mean of its divisors is an integer number (3611790).

Almost surely, 2^66672255 is an apocalyptic number.

66672255 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

66672255 is a deficient number, since it is larger than the sum of its proper divisors (48905025).

66672255 is a wasteful number, since it uses less digits than its factorization.

66672255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2091.

The product of its digits is 151200, while the sum is 39.

The square root of 66672255 is about 8165.3080162355. The cubic root of 66672255 is about 405.4914625124.

The spelling of 66672255 in words is "sixty-six million, six hundred seventy-two thousand, two hundred fifty-five".