661472794 has 8 divisors (see below), whose sum is σ = 993074688. Its totient is φ = 330447900.

The previous prime is 661472759. The next prime is 661472797. The reversal of 661472794 is 497274166.

661472794 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (661472797) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141372 + ... + 145975.

It is an arithmetic number, because the mean of its divisors is an integer number (124134336).

Almost surely, 2^661472794 is an apocalyptic number.

661472794 is a deficient number, since it is larger than the sum of its proper divisors (331601894).

661472794 is a wasteful number, since it uses less digits than its factorization.

661472794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288500.

The product of its digits is 508032, while the sum is 46.

The square root of 661472794 is about 25719.1133984047. The cubic root of 661472794 is about 871.3059147593.

It can be divided in two parts, 661472 and 794, that added together give a palindrome (662266).

The spelling of 661472794 in words is "six hundred sixty-one million, four hundred seventy-two thousand, seven hundred ninety-four".