66142702 has 4 divisors (see below), whose sum is σ = 99214056. Its totient is φ = 33071350.

The previous prime is 66142697. The next prime is 66142709. The reversal of 66142702 is 20724166.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66142709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16535674 + ... + 16535677.

It is an arithmetic number, because the mean of its divisors is an integer number (24803514).

Almost surely, 2^66142702 is an apocalyptic number.

66142702 is a deficient number, since it is larger than the sum of its proper divisors (33071354).

66142702 is a wasteful number, since it uses less digits than its factorization.

66142702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33071353.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 66142702 is about 8132.8163633516. The cubic root of 66142702 is about 404.4150515064.

Adding to 66142702 its reverse (20724166), we get a palindrome (86866868).

It can be divided in two parts, 6614 and 2702, that added together give a triangular number (9316 = T₁₃₆).

The spelling of 66142702 in words is "sixty-six million, one hundred forty-two thousand, seven hundred two".