66053631 has 32 divisors (see below), whose sum is σ = 105799680. Its totient is φ = 35839584.

The previous prime is 66053629. The next prime is 66053639. The reversal of 66053631 is 13635066.

It is not a de Polignac number, because 66053631 - 2¹ = 66053629 is a prime.

It is a super-2 number, since 2×66053631² = 8726164336568322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66053639) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78310 + ... + 79148.

It is an arithmetic number, because the mean of its divisors is an integer number (3306240).

Almost surely, 2^66053631 is an apocalyptic number.

66053631 is a deficient number, since it is larger than the sum of its proper divisors (39746049).

66053631 is a wasteful number, since it uses less digits than its factorization.

66053631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1035.

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 66053631 is about 8127.3384942427. The cubic root of 66053631 is about 404.2334349229.

Adding to 66053631 its reverse (13635066), we get a palindrome (79688697).

The spelling of 66053631 in words is "sixty-six million, fifty-three thousand, six hundred thirty-one".