66357669 has 8 divisors (see below), whose sum is σ = 101116480. Its totient is φ = 37918656.

The previous prime is 66357649. The next prime is 66357673. The reversal of 66357669 is 96675366.

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

It is not a de Polignac number, because 66357669 - 2¹⁶ = 66292133 is a prime.

It is a super-2 number, since 2×66357669² = 8806680470227122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66357649) 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, 1579924 + ... + 1579965.

It is an arithmetic number, because the mean of its divisors is an integer number (12639560).

Almost surely, 2^66357669 is an apocalyptic number.

It is an amenable number.

66357669 is a deficient number, since it is larger than the sum of its proper divisors (34758811).

66357669 is a wasteful number, since it uses less digits than its factorization.

66357669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3159899.

The product of its digits is 1224720, while the sum is 48.

The square root of 66357669 is about 8146.0216670471. The cubic root of 66357669 is about 404.8527005867.

The spelling of 66357669 in words is "sixty-six million, three hundred fifty-seven thousand, six hundred sixty-nine".