661162480 has 40 divisors (see below), whose sum is σ = 1676950704. Its totient is φ = 240422400.

The previous prime is 661162471. The next prime is 661162483. The reversal of 661162480 is 84261166.

661162480 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661162483) 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, 374781 + ... + 376540.

Almost surely, 2^661162480 is an apocalyptic number.

It is an amenable number.

661162480 is an abundant number, since it is smaller than the sum of its proper divisors (1015788224).

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

661162480 is a wasteful number, since it uses less digits than its factorization.

661162480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751345 (or 751339 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 661162480 is about 25713.0799399839. The cubic root of 661162480 is about 871.1696427324.

The spelling of 661162480 in words is "six hundred sixty-one million, one hundred sixty-two thousand, four hundred eighty".