1001525016661 has 16 divisors (see below), whose sum is σ = 1079527228416. Its totient is φ = 923660631936.

The previous prime is 1001525016647. The next prime is 1001525016691. The reversal of 1001525016661 is 1666105251001.

It is a cyclic number.

It is not a de Polignac number, because 1001525016661 - 2⁷ = 1001525016533 is a prime.

It is a super-3 number, since 3×1001525016661³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001525016691) 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, 78773241 + ... + 78785953.

It is an arithmetic number, because the mean of its divisors is an integer number (67470451776).

Almost surely, 2^{1001525016661} is an apocalyptic number.

It is an amenable number.

1001525016661 is a deficient number, since it is larger than the sum of its proper divisors (78002211755).

1001525016661 is a wasteful number, since it uses less digits than its factorization.

1001525016661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17652.

The product of its (nonzero) digits is 10800, while the sum is 34.

The spelling of 1001525016661 in words is "one trillion, one billion, five hundred twenty-five million, sixteen thousand, six hundred sixty-one".