2661343402 has 4 divisors (see below), whose sum is σ = 3992015106. Its totient is φ = 1330671700.

The previous prime is 2661343337. The next prime is 2661343411. The reversal of 2661343402 is 2043431662.

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., 2397962961 + 263380441 = 48969^2 + 16229^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665335849 + ... + 665335852.

Almost surely, 2^2661343402 is an apocalyptic number.

2661343402 is a deficient number, since it is larger than the sum of its proper divisors (1330671704).

2661343402 is a wasteful number, since it uses less digits than its factorization.

2661343402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330671703.

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 2661343402 is about 51588.2099127310. The cubic root of 2661343402 is about 1385.7991976299.

The spelling of 2661343402 in words is "two billion, six hundred sixty-one million, three hundred forty-three thousand, four hundred two".