66775355 has 8 divisors (see below), whose sum is σ = 80190864. Its totient is φ = 53380000.

The previous prime is 66775339. The next prime is 66775369. The reversal of 66775355 is 55357766.

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

It is not a de Polignac number, because 66775355 - 2⁴ = 66775339 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3605 + ... + 12105.

It is an arithmetic number, because the mean of its divisors is an integer number (10023858).

Almost surely, 2^66775355 is an apocalyptic number.

66775355 is a deficient number, since it is larger than the sum of its proper divisors (13415509).

66775355 is a wasteful number, since it uses less digits than its factorization.

66775355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10077.

The product of its digits is 661500, while the sum is 44.

The square root of 66775355 is about 8171.6188726592. The cubic root of 66775355 is about 405.7003681959.

The spelling of 66775355 in words is "sixty-six million, seven hundred seventy-five thousand, three hundred fifty-five".