6661554031 has 16 divisors (see below), whose sum is σ = 7314553728. Its totient is φ = 6016572000.

The previous prime is 6661554019. The next prime is 6661554041. The reversal of 6661554031 is 1304551666.

It is a cyclic number.

It is not a de Polignac number, because 6661554031 - 2²³ = 6653165423 is a prime.

It is a super-2 number, since 2×6661554031² = 88752604215864697922, 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 (6661554041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1303381 + ... + 1308481.

It is an arithmetic number, because the mean of its divisors is an integer number (457159608).

Almost surely, 2^6661554031 is an apocalyptic number.

6661554031 is a deficient number, since it is larger than the sum of its proper divisors (652999697).

6661554031 is a wasteful number, since it uses less digits than its factorization.

6661554031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5862.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 6661554031 is about 81618.3437163485. The cubic root of 6661554031 is about 1881.5908172842.

The spelling of 6661554031 in words is "six billion, six hundred sixty-one million, five hundred fifty-four thousand, thirty-one".