661232146632 has 64 divisors (see below), whose sum is σ = 1742060779200. Its totient is φ = 208573009920.

The previous prime is 661232146579. The next prime is 661232146633. The reversal of 661232146632 is 236641232166.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (661232146633) 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, 421233 + ... + 1224704.

It is an arithmetic number, because the mean of its divisors is an integer number (27219699675).

Almost surely, 2^661232146632 is an apocalyptic number.

It is an amenable number.

661232146632 is an abundant number, since it is smaller than the sum of its proper divisors (1080828632568).

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

661232146632 is a wasteful number, since it uses less digits than its factorization.

661232146632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1646846 (or 1646842 counting only the distinct ones).

The product of its digits is 373248, while the sum is 42.

Adding to 661232146632 its reverse (236641232166), we get a palindrome (897873378798).

The spelling of 661232146632 in words is "six hundred sixty-one billion, two hundred thirty-two million, one hundred forty-six thousand, six hundred thirty-two".