66056613 has 8 divisors (see below), whose sum is σ = 100657728. Its totient is φ = 37746624.

The previous prime is 66056593. The next prime is 66056623. The reversal of 66056613 is 31665066.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66056613 - 2¹⁴ = 66040229 is a prime.

It is a super-2 number, since 2×66056613² = 8726952242063538, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66056623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1572756 + ... + 1572797.

It is an arithmetic number, because the mean of its divisors is an integer number (12582216).

Almost surely, 2^66056613 is an apocalyptic number.

It is an amenable number.

66056613 is a deficient number, since it is larger than the sum of its proper divisors (34601115).

66056613 is a wasteful number, since it uses less digits than its factorization.

66056613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3145563.

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 66056613 is about 8127.5219470636. The cubic root of 66056613 is about 404.2395178889.

The spelling of 66056613 in words is "sixty-six million, fifty-six thousand, six hundred thirteen".