166722542 has 16 divisors (see below), whose sum is σ = 286471680. Its totient is φ = 71287128.

The previous prime is 166722541. The next prime is 166722547. The reversal of 166722542 is 245227661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166722541) 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, 7418 + ... + 19709.

It is an arithmetic number, because the mean of its divisors is an integer number (17904480).

Almost surely, 2^166722542 is an apocalyptic number.

166722542 is a deficient number, since it is larger than the sum of its proper divisors (119749138).

166722542 is a wasteful number, since it uses less digits than its factorization.

166722542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27575.

The product of its digits is 40320, while the sum is 35.

The square root of 166722542 is about 12912.1083483682. The cubic root of 166722542 is about 550.3827000397.

The spelling of 166722542 in words is "one hundred sixty-six million, seven hundred twenty-two thousand, five hundred forty-two".