15205742066 has 16 divisors (see below), whose sum is σ = 24184323360. Its totient is φ = 7150142880.

The previous prime is 15205742063. The next prime is 15205742081. The reversal of 15205742066 is 66024750251.

It is a super-3 number, since 3×15205742066³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (15205742063) 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, 1455200 + ... + 1465611.

It is an arithmetic number, because the mean of its divisors is an integer number (1511520210).

Almost surely, 2^15205742066 is an apocalyptic number.

15205742066 is a deficient number, since it is larger than the sum of its proper divisors (8978581294).

15205742066 is a wasteful number, since it uses less digits than its factorization.

15205742066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2920969.

The product of its (nonzero) digits is 100800, while the sum is 38.

The spelling of 15205742066 in words is "fifteen billion, two hundred five million, seven hundred forty-two thousand, sixty-six".