61066631 has 4 divisors (see below), whose sum is σ = 61134000. Its totient is φ = 60999264.

The previous prime is 61066619. The next prime is 61066637. The reversal of 61066631 is 13666016.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61066631 - 2¹⁸ = 60804487 is a prime.

It is a super-2 number, since 2×61066631² = 7458266843380322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61066594 and 61066603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61066637) 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, 32306 + ... + 34143.

It is an arithmetic number, because the mean of its divisors is an integer number (15283500).

Almost surely, 2^61066631 is an apocalyptic number.

61066631 is a deficient number, since it is larger than the sum of its proper divisors (67369).

61066631 is an equidigital number, since it uses as much as digits as its factorization.

61066631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67368.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 61066631 is about 7814.5141243714. The cubic root of 61066631 is about 393.7929955233.

The spelling of 61066631 in words is "sixty-one million, sixty-six thousand, six hundred thirty-one".