661052224650131 has 4 divisors (see below), whose sum is σ = 662239032953472. Its totient is φ = 659865416346792.

The previous prime is 661052224650119. The next prime is 661052224650143. The reversal of 661052224650131 is 131056422250166.

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 (661052224650119) and next prime (661052224650143).

It is a cyclic number.

It is not a de Polignac number, because 661052224650131 - 2¹⁸ = 661052224387987 is a prime.

It is a super-2 number, since 2×661052224650131² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (661052224650151) 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, 593404150835 + ... + 593404151948.

It is an arithmetic number, because the mean of its divisors is an integer number (165559758238368).

Almost surely, 2^{661052224650131} is an apocalyptic number.

661052224650131 is a deficient number, since it is larger than the sum of its proper divisors (1186808303341).

661052224650131 is a wasteful number, since it uses less digits than its factorization.

661052224650131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1186808303340.

The product of its (nonzero) digits is 518400, while the sum is 44.

The spelling of 661052224650131 in words is "six hundred sixty-one trillion, fifty-two billion, two hundred twenty-four million, six hundred fifty thousand, one hundred thirty-one".