66285877 has 6 divisors (see below), whose sum is σ = 77108118. Its totient is φ = 56816424.

The previous prime is 66285853. The next prime is 66285883. The reversal of 66285877 is 77858266.

It can be written as a sum of positive squares in only one way, i.e., 49688401 + 16597476 = 7049^2 + 4074^2 .

It is not a de Polignac number, because 66285877 - 2⁷ = 66285749 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49), and also a Moran number because the ratio is a prime number: 1352773 = 66285877 / (6 + 6 + 2 + 8 + 5 + 8 + 7 + 7).

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 66285877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66285827) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 676338 + ... + 676435.

It is an arithmetic number, because the mean of its divisors is an integer number (12851353).

Almost surely, 2^66285877 is an apocalyptic number.

It is an amenable number.

66285877 is a deficient number, since it is larger than the sum of its proper divisors (10822241).

66285877 is a wasteful number, since it uses less digits than its factorization.

66285877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1352787 (or 1352780 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 49.

The square root of 66285877 is about 8141.6139063456. The cubic root of 66285877 is about 404.7066452593.

The spelling of 66285877 in words is "sixty-six million, two hundred eighty-five thousand, eight hundred seventy-seven".