66927949 has 8 divisors (see below), whose sum is σ = 74793600. Its totient is φ = 59359200.

The previous prime is 66927943. The next prime is 66928009. The reversal of 66927949 is 94972966.

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 66927949 - 2⁷ = 66927821 is a prime.

It is a super-4 number, since 4×66927949⁴ (a number of 32 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66927896 and 66927905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66927943) 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, 73749 + ... + 74650.

It is an arithmetic number, because the mean of its divisors is an integer number (9349200).

Almost surely, 2^66927949 is an apocalyptic number.

It is an amenable number.

66927949 is a deficient number, since it is larger than the sum of its proper divisors (7865651).

66927949 is a wasteful number, since it uses less digits than its factorization.

66927949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148451.

The product of its digits is 1469664, while the sum is 52.

The square root of 66927949 is about 8180.9503726645. The cubic root of 66927949 is about 406.0091664799.

It can be divided in two parts, 66927 and 949, that added together give a palindrome (67876).

The spelling of 66927949 in words is "sixty-six million, nine hundred twenty-seven thousand, nine hundred forty-nine".