66956929 has 8 divisors (see below), whose sum is σ = 72181760. Its totient is φ = 61742736.

The previous prime is 66956927. The next prime is 66956959. The reversal of 66956929 is 92965966.

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

It is a cyclic number.

It is not a de Polignac number, because 66956929 - 2¹ = 66956927 is a prime.

It is a super-2 number, since 2×66956929² = 8966460682222082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66956921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14614 + ... + 18640.

It is an arithmetic number, because the mean of its divisors is an integer number (9022720).

Almost surely, 2^66956929 is an apocalyptic number.

It is an amenable number.

66956929 is a deficient number, since it is larger than the sum of its proper divisors (5224831).

66956929 is a wasteful number, since it uses less digits than its factorization.

66956929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5319.

The product of its digits is 1574640, while the sum is 52.

The square root of 66956929 is about 8182.7213688357. The cubic root of 66956929 is about 406.0677590807.

The spelling of 66956929 in words is "sixty-six million, nine hundred fifty-six thousand, nine hundred twenty-nine".