662191861632 has 64 divisors (see below), whose sum is σ = 2010225302400. Its totient is φ = 189197673984.

The previous prime is 662191861621. The next prime is 662191861781. The reversal of 662191861632 is 236168191266.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×662191861632² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123172882 + ... + 123178257.

It is an arithmetic number, because the mean of its divisors is an integer number (31409770350).

Almost surely, 2^662191861632 is an apocalyptic number.

It is an amenable number.

662191861632 is an abundant number, since it is smaller than the sum of its proper divisors (1348033440768).

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

662191861632 is a wasteful number, since it uses less digits than its factorization.

662191861632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246351163 (or 246351151 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 51.

The spelling of 662191861632 in words is "six hundred sixty-two billion, one hundred ninety-one million, eight hundred sixty-one thousand, six hundred thirty-two".