15401620066 has 16 divisors (see below), whose sum is σ = 26431909056. Its totient is φ = 6593411376.

The previous prime is 15401620057. The next prime is 15401620093. The reversal of 15401620066 is 66002610451.

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, 593761 + ... + 619156.

It is an arithmetic number, because the mean of its divisors is an integer number (1651994316).

Almost surely, 2^15401620066 is an apocalyptic number.

15401620066 is a deficient number, since it is larger than the sum of its proper divisors (11030288990).

15401620066 is a wasteful number, since it uses less digits than its factorization.

15401620066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1213833.

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 15401620066 in words is "fifteen billion, four hundred one million, six hundred twenty thousand, sixty-six".