66542295 has 16 divisors (see below), whose sum is σ = 108477792. Its totient is φ = 34819200.

The previous prime is 66542279. The next prime is 66542321. The reversal of 66542295 is 59224566.

It is not a de Polignac number, because 66542295 - 2⁴ = 66542279 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41056 + ... + 42645.

It is an arithmetic number, because the mean of its divisors is an integer number (6779862).

Almost surely, 2^66542295 is an apocalyptic number.

66542295 is a deficient number, since it is larger than the sum of its proper divisors (41935497).

66542295 is a wasteful number, since it uses less digits than its factorization.

66542295 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83762.

The product of its digits is 129600, while the sum is 39.

The square root of 66542295 is about 8157.3460757773. The cubic root of 66542295 is about 405.2278248735.

It can be divided in two parts, 66 and 542295, that added together give a triangular number (542361 = T₁₀₄₁).

The spelling of 66542295 in words is "sixty-six million, five hundred forty-two thousand, two hundred ninety-five".