66051653 has 4 divisors (see below), whose sum is σ = 68923488. Its totient is φ = 63179820.

The previous prime is 66051637. The next prime is 66051659. The reversal of 66051653 is 35615066.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66051653 - 2⁴ = 66051637 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 (66051659) 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, 1435883 + ... + 1435928.

It is an arithmetic number, because the mean of its divisors is an integer number (17230872).

Almost surely, 2^66051653 is an apocalyptic number.

It is an amenable number.

66051653 is a deficient number, since it is larger than the sum of its proper divisors (2871835).

66051653 is a wasteful number, since it uses less digits than its factorization.

66051653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2871834.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 66051653 is about 8127.2168052784. The cubic root of 66051653 is about 404.2293999102.

The spelling of 66051653 in words is "sixty-six million, fifty-one thousand, six hundred fifty-three".