661063133051 has 4 divisors (see below), whose sum is σ = 661069046400. Its totient is φ = 661057219704.

The previous prime is 661063132997. The next prime is 661063133069. The reversal of 661063133051 is 150331360166.

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

It is a cyclic number.

It is not a de Polignac number, because 661063133051 - 2¹⁴ = 661063116667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (661063133251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2785691 + ... + 3013668.

It is an arithmetic number, because the mean of its divisors is an integer number (165267261600).

Almost surely, 2^661063133051 is an apocalyptic number.

661063133051 is a deficient number, since it is larger than the sum of its proper divisors (5913349).

661063133051 is a wasteful number, since it uses less digits than its factorization.

661063133051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5913348.

The product of its (nonzero) digits is 29160, while the sum is 35.

The spelling of 661063133051 in words is "six hundred sixty-one billion, sixty-three million, one hundred thirty-three thousand, fifty-one".