66349956 has 24 divisors (see below), whose sum is σ = 155088640. Its totient is φ = 22077792.

The previous prime is 66349949. The next prime is 66349961. The reversal of 66349956 is 65994366.

It is a happy number.

66349956 is nontrivially palindromic in base 5.

It is a super-2 number, since 2×66349956² = 8804633322403872, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2730 + ... + 11838.

Almost surely, 2^66349956 is an apocalyptic number.

It is an amenable number.

66349956 is an abundant number, since it is smaller than the sum of its proper divisors (88738684).

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

66349956 is a wasteful number, since it uses less digits than its factorization.

66349956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9723 (or 9721 counting only the distinct ones).

The product of its digits is 1049760, while the sum is 48.

The square root of 66349956 is about 8145.5482320099. The cubic root of 66349956 is about 404.8370141312.

The spelling of 66349956 in words is "sixty-six million, three hundred forty-nine thousand, nine hundred fifty-six".