65661356 has 6 divisors (see below), whose sum is σ = 114907380. Its totient is φ = 32830676.

The previous prime is 65661341. The next prime is 65661373. The reversal of 65661356 is 65316656.

It is a super-2 number, since 2×65661356² = 8622827343517472, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8207666 + ... + 8207673.

It is an arithmetic number, because the mean of its divisors is an integer number (19151230).

Almost surely, 2^65661356 is an apocalyptic number.

It is an amenable number.

65661356 is a deficient number, since it is larger than the sum of its proper divisors (49246024).

65661356 is a wasteful number, since it uses less digits than its factorization.

65661356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16415343 (or 16415341 counting only the distinct ones).

The product of its digits is 97200, while the sum is 38.

The square root of 65661356 is about 8103.1695033487. The cubic root of 65661356 is about 403.4316338657.

The spelling of 65661356 in words is "sixty-five million, six hundred sixty-one thousand, three hundred fifty-six".