66131053 has 4 divisors (see below), whose sum is σ = 66239548. Its totient is φ = 66022560.

The previous prime is 66131041. The next prime is 66131081. The reversal of 66131053 is 35013166.

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 5322249 + 60808804 = 2307^2 + 7798^2 .

It is a cyclic number.

It is not a de Polignac number, because 66131053 - 2²¹ = 64033901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66131353) 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, 53328 + ... + 54553.

It is an arithmetic number, because the mean of its divisors is an integer number (16559887).

Almost surely, 2^66131053 is an apocalyptic number.

It is an amenable number.

66131053 is a deficient number, since it is larger than the sum of its proper divisors (108495).

66131053 is a wasteful number, since it uses less digits than its factorization.

66131053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108494.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 66131053 is about 8132.1001592455. The cubic root of 66131053 is about 404.3913083602.

The spelling of 66131053 in words is "sixty-six million, one hundred thirty-one thousand, fifty-three".