2660553631 has 4 divisors (see below), whose sum is σ = 2661995952. Its totient is φ = 2659111312.

The previous prime is 2660553619. The next prime is 2660553647. The reversal of 2660553631 is 1363550662.

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 2660553631 - 2⁷ = 2660553503 is a prime.

It is a super-2 number, since 2×2660553631² = 14157091246854568322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2660553661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 718390 + ... + 722083.

It is an arithmetic number, because the mean of its divisors is an integer number (665498988).

Almost surely, 2^2660553631 is an apocalyptic number.

2660553631 is a deficient number, since it is larger than the sum of its proper divisors (1442321).

2660553631 is a wasteful number, since it uses less digits than its factorization.

2660553631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1442320.

The product of its (nonzero) digits is 97200, while the sum is 37.

The square root of 2660553631 is about 51580.5547760006. The cubic root of 2660553631 is about 1385.6621024198.

The spelling of 2660553631 in words is "two billion, six hundred sixty million, five hundred fifty-three thousand, six hundred thirty-one".