3666722542 has 16 divisors (see below), whose sum is σ = 6288606432. Its totient is φ = 1570753440.

The previous prime is 3666722539. The next prime is 3666722557. The reversal of 3666722542 is 2452276663.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25009 + ... + 89212.

It is an arithmetic number, because the mean of its divisors is an integer number (393037902).

Almost surely, 2^3666722542 is an apocalyptic number.

3666722542 is a deficient number, since it is larger than the sum of its proper divisors (2621883890).

3666722542 is a wasteful number, since it uses less digits than its factorization.

3666722542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116523.

The product of its digits is 725760, while the sum is 43.

The square root of 3666722542 is about 60553.4684555724. The cubic root of 3666722542 is about 1542.0295025037.

The spelling of 3666722542 in words is "three billion, six hundred sixty-six million, seven hundred twenty-two thousand, five hundred forty-two".