661329014 has 8 divisors (see below), whose sum is σ = 1023993408. Its totient is φ = 319997880.

The previous prime is 661328989. The next prime is 661329049. The reversal of 661329014 is 410923166.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5333237 + ... + 5333360.

It is an arithmetic number, because the mean of its divisors is an integer number (127999176).

Almost surely, 2^661329014 is an apocalyptic number.

661329014 is a deficient number, since it is larger than the sum of its proper divisors (362664394).

661329014 is a wasteful number, since it uses less digits than its factorization.

661329014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10666630.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 661329014 is about 25716.3180490520. The cubic root of 661329014 is about 871.2427801686.

The spelling of 661329014 in words is "six hundred sixty-one million, three hundred twenty-nine thousand, fourteen".