2660646440602 has 4 divisors (see below), whose sum is σ = 3990969660906. Its totient is φ = 1330323220300.

The previous prime is 2660646440593. The next prime is 2660646440611. The reversal of 2660646440602 is 2060446460662.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (2660646440593) and next prime (2660646440611).

It can be written as a sum of positive squares in only one way, i.e., 2321932916521 + 338713524081 = 1523789^2 + 581991^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665161610149 + ... + 665161610152.

Almost surely, 2^{2660646440602} is an apocalyptic number.

2660646440602 is a deficient number, since it is larger than the sum of its proper divisors (1330323220304).

2660646440602 is a wasteful number, since it uses less digits than its factorization.

2660646440602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330323220303.

The product of its (nonzero) digits is 1990656, while the sum is 46.

The spelling of 2660646440602 in words is "two trillion, six hundred sixty billion, six hundred forty-six million, four hundred forty thousand, six hundred two".