2661332554 has 4 divisors (see below), whose sum is σ = 3991998834. Its totient is φ = 1330666276.

The previous prime is 2661332537. The next prime is 2661332573. The reversal of 2661332554 is 4552331662.

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

It can be written as a sum of positive squares in only one way, i.e., 2348856225 + 312476329 = 48465^2 + 17677^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665333137 + ... + 665333140.

Almost surely, 2^2661332554 is an apocalyptic number.

2661332554 is a deficient number, since it is larger than the sum of its proper divisors (1330666280).

2661332554 is a wasteful number, since it uses less digits than its factorization.

2661332554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1330666279.

The product of its digits is 129600, while the sum is 37.

The square root of 2661332554 is about 51588.1047723213. The cubic root of 2661332554 is about 1385.7973147250.

The spelling of 2661332554 in words is "two billion, six hundred sixty-one million, three hundred thirty-two thousand, five hundred fifty-four".