66620695 has 8 divisors (see below), whose sum is σ = 81894960. Its totient is φ = 51996480.

The previous prime is 66620693. The next prime is 66620753. The reversal of 66620695 is 59602666.

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

It is not a de Polignac number, because 66620695 - 2¹ = 66620693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66620693) 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, 162285 + ... + 162694.

It is an arithmetic number, because the mean of its divisors is an integer number (10236870).

Almost surely, 2^66620695 is an apocalyptic number.

66620695 is a deficient number, since it is larger than the sum of its proper divisors (15274265).

66620695 is a wasteful number, since it uses less digits than its factorization.

66620695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325025.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 66620695 is about 8162.1501456418. The cubic root of 66620695 is about 405.3869086190.

The spelling of 66620695 in words is "sixty-six million, six hundred twenty thousand, six hundred ninety-five".