661525341594 has 16 divisors (see below), whose sum is σ = 1424823812832. Its totient is φ = 203546258928.

The previous prime is 661525341593. The next prime is 661525341629. The reversal of 661525341594 is 495143525166.

It is not an unprimeable number, because it can be changed into a prime (661525341593) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4240546984 + ... + 4240547139.

It is an arithmetic number, because the mean of its divisors is an integer number (89051488302).

Almost surely, 2^661525341594 is an apocalyptic number.

661525341594 is an abundant number, since it is smaller than the sum of its proper divisors (763298471238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

661525341594 is a wasteful number, since it uses less digits than its factorization.

661525341594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8481094141.

The product of its digits is 3888000, while the sum is 51.

The spelling of 661525341594 in words is "six hundred sixty-one billion, five hundred twenty-five million, three hundred forty-one thousand, five hundred ninety-four".