661490562096 has 160 divisors (see below), whose sum is σ = 2336889873920. Its totient is φ = 174459038976.

The previous prime is 661490562091. The next prime is 661490562119. The reversal of 661490562096 is 690265094166.

661490562096 is a `hidden beast` number, since 6 + 6 + 1 + 4 + 9 + 0 + 5 + 620 + 9 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (661490562091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8374030 + ... + 8452653.

It is an arithmetic number, because the mean of its divisors is an integer number (14605561712).

Almost surely, 2^661490562096 is an apocalyptic number.

It is an amenable number.

661490562096 is an abundant number, since it is smaller than the sum of its proper divisors (1675399311824).

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

661490562096 is a wasteful number, since it uses less digits than its factorization.

661490562096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16826720 (or 16826708 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 54.

The spelling of 661490562096 in words is "six hundred sixty-one billion, four hundred ninety million, five hundred sixty-two thousand, ninety-six".