66738077 has 16 divisors (see below), whose sum is σ = 80403840. Its totient is φ = 54180672.

The previous prime is 66738053. The next prime is 66738079. The reversal of 66738077 is 77083766.

It is a de Polignac number, because none of the positive numbers 2^k-66738077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66738079) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7658 + ... + 13860.

It is an arithmetic number, because the mean of its divisors is an integer number (5025240).

Almost surely, 2^66738077 is an apocalyptic number.

It is an amenable number.

66738077 is a deficient number, since it is larger than the sum of its proper divisors (13665763).

66738077 is a wasteful number, since it uses less digits than its factorization.

66738077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6292.

The product of its (nonzero) digits is 296352, while the sum is 44.

The square root of 66738077 is about 8169.3376108470. The cubic root of 66738077 is about 405.6248587333.

The spelling of 66738077 in words is "sixty-six million, seven hundred thirty-eight thousand, seventy-seven".