661427250322 has 16 divisors (see below), whose sum is σ = 1027147752000. Its totient is φ = 319062335760.

The previous prime is 661427250307. The next prime is 661427250331. The reversal of 661427250322 is 223052724166.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4341822 + ... + 4491577.

It is an arithmetic number, because the mean of its divisors is an integer number (64196734500).

Almost surely, 2^661427250322 is an apocalyptic number.

661427250322 is a deficient number, since it is larger than the sum of its proper divisors (365720501678).

661427250322 is a wasteful number, since it uses less digits than its factorization.

661427250322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8834721.

The product of its (nonzero) digits is 241920, while the sum is 40.

Adding to 661427250322 its reverse (223052724166), we get a palindrome (884479974488).

The spelling of 661427250322 in words is "six hundred sixty-one billion, four hundred twenty-seven million, two hundred fifty thousand, three hundred twenty-two".