66375877 has 4 divisors (see below), whose sum is σ = 66984940. Its totient is φ = 65766816.

The previous prime is 66375863. The next prime is 66375889. The reversal of 66375877 is 77857366.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 39012516 + 27363361 = 6246^2 + 5231^2 .

It is a cyclic number.

It is not a de Polignac number, because 66375877 - 2¹¹ = 66373829 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66375877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66375277) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 304368 + ... + 304585.

It is an arithmetic number, because the mean of its divisors is an integer number (16746235).

Almost surely, 2^66375877 is an apocalyptic number.

It is an amenable number.

66375877 is a deficient number, since it is larger than the sum of its proper divisors (609063).

66375877 is a wasteful number, since it uses less digits than its factorization.

66375877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609062.

The product of its digits is 1481760, while the sum is 49.

The square root of 66375877 is about 8147.1391911517. The cubic root of 66375877 is about 404.8897266203.

The spelling of 66375877 in words is "sixty-six million, three hundred seventy-five thousand, eight hundred seventy-seven".