661456302 has 64 divisors (see below), whose sum is σ = 1482485760. Its totient is φ = 195350400.

The previous prime is 661456283. The next prime is 661456303. The reversal of 661456302 is 203654166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661456303) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 431277 + ... + 432807.

It is an arithmetic number, because the mean of its divisors is an integer number (23163840).

Almost surely, 2^661456302 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 661456302, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (741242880).

661456302 is an abundant number, since it is smaller than the sum of its proper divisors (821029458).

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

661456302 is a wasteful number, since it uses less digits than its factorization.

661456302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1769.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 661456302 is about 25718.7927788223. The cubic root of 661456302 is about 871.2986734957.

The spelling of 661456302 in words is "six hundred sixty-one million, four hundred fifty-six thousand, three hundred two".