166001011621016 has 64 divisors (see below), whose sum is σ = 366283203945120. Its totient is φ = 69533318891520.

The previous prime is 166001011621013. The next prime is 166001011621019. The reversal of 166001011621016 is 610126110100661.

It is an interprime number because it is at equal distance from previous prime (166001011621013) and next prime (166001011621019).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166001011621013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121670495 + ... + 123027278.

Almost surely, 2^{166001011621016} is an apocalyptic number.

It is an amenable number.

166001011621016 is an abundant number, since it is smaller than the sum of its proper divisors (200282192324104).

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

166001011621016 is a wasteful number, since it uses less digits than its factorization.

166001011621016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244698396 (or 244698392 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 32.

Adding to 166001011621016 its reverse (610126110100661), we get a palindrome (776127121721677).

The spelling of 166001011621016 in words is "one hundred sixty-six trillion, one billion, eleven million, six hundred twenty-one thousand, sixteen".