2661039026 has 4 divisors (see below), whose sum is σ = 3991558542. Its totient is φ = 1330519512.

The previous prime is 2661039023. The next prime is 2661039061. The reversal of 2661039026 is 6209301662.

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., 2328159001 + 332880025 = 48251^2 + 18245^2 .

It is a super-2 number, since 2×2661039026² = 14162257395790057352, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2661039023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665259755 + ... + 665259758.

Almost surely, 2^2661039026 is an apocalyptic number.

2661039026 is a deficient number, since it is larger than the sum of its proper divisors (1330519516).

2661039026 is a wasteful number, since it uses less digits than its factorization.

2661039026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330519515.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 2661039026 is about 51585.2597744743. The cubic root of 2661039026 is about 1385.7463646512.

The spelling of 2661039026 in words is "two billion, six hundred sixty-one million, thirty-nine thousand, twenty-six".