66737677 has 8 divisors (see below), whose sum is σ = 70137056. Its totient is φ = 63422352.

The previous prime is 66737647. The next prime is 66737681. The reversal of 66737677 is 77673766.

It is a happy number.

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 66737677 - 2²³ = 58349069 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66737677.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66737617) 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, 19383 + ... + 22564.

It is an arithmetic number, because the mean of its divisors is an integer number (8767132).

Almost surely, 2^66737677 is an apocalyptic number.

It is an amenable number.

66737677 is a deficient number, since it is larger than the sum of its proper divisors (3399379).

66737677 is a wasteful number, since it uses less digits than its factorization.

66737677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42027.

The product of its digits is 1555848, while the sum is 49.

The square root of 66737677 is about 8169.3131290213. The cubic root of 66737677 is about 405.6240483500.

The spelling of 66737677 in words is "sixty-six million, seven hundred thirty-seven thousand, six hundred seventy-seven".