66542877 has 24 divisors (see below), whose sum is σ = 102123840. Its totient is φ = 43273440.

The previous prime is 66542869. The next prime is 66542881. The reversal of 66542877 is 77824566.

It is not a de Polignac number, because 66542877 - 2³ = 66542869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66542837) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6624 + ... + 13302.

It is an arithmetic number, because the mean of its divisors is an integer number (4255160).

Almost surely, 2^66542877 is an apocalyptic number.

It is an amenable number.

66542877 is a deficient number, since it is larger than the sum of its proper divisors (35580963).

66542877 is an equidigital number, since it uses as much as digits as its factorization.

66542877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6735 (or 6723 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The square root of 66542877 is about 8157.3817490663. The cubic root of 66542877 is about 405.2290062870.

The spelling of 66542877 in words is "sixty-six million, five hundred forty-two thousand, eight hundred seventy-seven".