66157206 has 16 divisors (see below), whose sum is σ = 133486704. Its totient is φ = 21857024.

The previous prime is 66157181. The next prime is 66157211. The reversal of 66157206 is 60275166.

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, 48111 + ... + 49466.

It is an arithmetic number, because the mean of its divisors is an integer number (8342919).

Almost surely, 2^66157206 is an apocalyptic number.

66157206 is an abundant number, since it is smaller than the sum of its proper divisors (67329498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66157206 is a wasteful number, since it uses less digits than its factorization.

66157206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97695.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 66157206 is about 8133.7080104956. The cubic root of 66157206 is about 404.4446098554. Note that the first 3 decimals are identical.

The spelling of 66157206 in words is "sixty-six million, one hundred fifty-seven thousand, two hundred six".