664612551042 has 32 divisors (see below), whose sum is σ = 1473835293504. Its totient is φ = 198096139200.

The previous prime is 664612551041. The next prime is 664612551049. The reversal of 664612551042 is 240155216466.

It is a junction number, because it is equal to n+sod(n) for n = 664612550985 and 664612551003.

It is not an unprimeable number, because it can be changed into a prime (664612551041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82536033 + ... + 82544084.

It is an arithmetic number, because the mean of its divisors is an integer number (46057352922).

Almost surely, 2^664612551042 is an apocalyptic number.

664612551042 is an abundant number, since it is smaller than the sum of its proper divisors (809222742462).

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

664612551042 is a wasteful number, since it uses less digits than its factorization.

664612551042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165080194.

The product of its (nonzero) digits is 345600, while the sum is 42.

The spelling of 664612551042 in words is "six hundred sixty-four billion, six hundred twelve million, five hundred fifty-one thousand, forty-two".