661078486 has 8 divisors (see below), whose sum is σ = 993124440. Its totient is φ = 330037008.

The previous prime is 661078477. The next prime is 661078493. The reversal of 661078486 is 684870166.

It is a happy number.

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, 249471 + ... + 252106.

It is an arithmetic number, because the mean of its divisors is an integer number (124140555).

Almost surely, 2^661078486 is an apocalyptic number.

661078486 is a deficient number, since it is larger than the sum of its proper divisors (332045954).

661078486 is a wasteful number, since it uses less digits than its factorization.

661078486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502238.

The product of its (nonzero) digits is 387072, while the sum is 46.

The square root of 661078486 is about 25711.4465948534. The cubic root of 661078486 is about 871.1327500754.

The spelling of 661078486 in words is "six hundred sixty-one million, seventy-eight thousand, four hundred eighty-six".