660997792 has 48 divisors (see below), whose sum is σ = 1601655552. Its totient is φ = 261492480.

The previous prime is 660997781. The next prime is 660997793. The reversal of 660997792 is 297799066.

It is not an unprimeable number, because it can be changed into a prime (660997793) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110584 + ... + 116407.

It is an arithmetic number, because the mean of its divisors is an integer number (33367824).

Almost surely, 2^660997792 is an apocalyptic number.

It is an amenable number.

660997792 is an abundant number, since it is smaller than the sum of its proper divisors (940657760).

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

660997792 is a wasteful number, since it uses less digits than its factorization.

660997792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227021 (or 227013 counting only the distinct ones).

The product of its (nonzero) digits is 2571912, while the sum is 55.

The square root of 660997792 is about 25709.8773237058. The cubic root of 660997792 is about 871.0973039330.

It can be divided in two parts, 6609 and 97792, that added together give a palindrome (104401).

The spelling of 660997792 in words is "six hundred sixty million, nine hundred ninety-seven thousand, seven hundred ninety-two".