66214395 has 64 divisors (see below), whose sum is σ = 131241600. Its totient is φ = 31449600.

The previous prime is 66214381. The next prime is 66214397. The reversal of 66214395 is 59341266.

It is a happy number.

It is not a de Polignac number, because 66214395 - 2⁵ = 66214363 is a prime.

It is a super-2 number, since 2×66214395² = 8768692210432050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66214397) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 50245 + ... + 51545.

It is an arithmetic number, because the mean of its divisors is an integer number (2050650).

Almost surely, 2^66214395 is an apocalyptic number.

66214395 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

66214395 is a deficient number, since it is larger than the sum of its proper divisors (65027205).

66214395 is a wasteful number, since it uses less digits than its factorization.

66214395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1357 (or 1351 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 66214395 is about 8137.2228063388. Note that the first 3 decimals coincide. The cubic root of 66214395 is about 404.5611157893.

The spelling of 66214395 in words is "sixty-six million, two hundred fourteen thousand, three hundred ninety-five".