661734370 has 32 divisors (see below), whose sum is σ = 1341328896. Its totient is φ = 232867200.

The previous prime is 661734343. The next prime is 661734373. The reversal of 661734370 is 73437166.

661734370 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (661734373) 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, 93619 + ... + 100438.

It is an arithmetic number, because the mean of its divisors is an integer number (41916528).

Almost surely, 2^661734370 is an apocalyptic number.

661734370 is an abundant number, since it is smaller than the sum of its proper divisors (679594526).

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

661734370 is a wasteful number, since it uses less digits than its factorization.

661734370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194106.

The product of its (nonzero) digits is 63504, while the sum is 37.

The square root of 661734370 is about 25724.1981410500. The cubic root of 661734370 is about 871.4207507648.

The spelling of 661734370 in words is "six hundred sixty-one million, seven hundred thirty-four thousand, three hundred seventy".