661360802 has 8 divisors (see below), whose sum is σ = 997235712. Its totient is φ = 328948900.

The previous prime is 661360753. The next prime is 661360807. The reversal of 661360802 is 208063166.

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

It is a super-2 number, since 2×661360802² = 874796220844166408, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (661360807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 865274 + ... + 866037.

It is an arithmetic number, because the mean of its divisors is an integer number (124654464).

Almost surely, 2^661360802 is an apocalyptic number.

661360802 is a deficient number, since it is larger than the sum of its proper divisors (335874910).

661360802 is a wasteful number, since it uses less digits than its factorization.

661360802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1731504.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 661360802 is about 25716.9360927775. The cubic root of 661360802 is about 871.2567392425.

The spelling of 661360802 in words is "six hundred sixty-one million, three hundred sixty thousand, eight hundred two".