66920277 has 8 divisors (see below), whose sum is σ = 90110880. Its totient is φ = 44171600.

The previous prime is 66920267. The next prime is 66920311. The reversal of 66920277 is 77202966.

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 66920277 - 2⁶ = 66920213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66920207) 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, 110127 + ... + 110732.

It is an arithmetic number, because the mean of its divisors is an integer number (11263860).

Almost surely, 2^66920277 is an apocalyptic number.

It is an amenable number.

66920277 is a deficient number, since it is larger than the sum of its proper divisors (23190603).

66920277 is a wasteful number, since it uses less digits than its factorization.

66920277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220963.

The product of its (nonzero) digits is 63504, while the sum is 39.

The square root of 66920277 is about 8180.4814650484. The cubic root of 66920277 is about 405.9936521774.

The spelling of 66920277 in words is "sixty-six million, nine hundred twenty thousand, two hundred seventy-seven".