15106001661 has 64 divisors (see below), whose sum is σ = 25803360000. Its totient is φ = 8669638656.

The previous prime is 15106001657. The next prime is 15106001671. The reversal of 15106001661 is 16610060151.

15106001661 is a `hidden beast` number, since 1 + 51 + 0 + 600 + 1 + 6 + 6 + 1 = 666.

It is not a de Polignac number, because 15106001661 - 2² = 15106001657 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15106001611) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 223045 + ... + 282773.

It is an arithmetic number, because the mean of its divisors is an integer number (403177500).

Almost surely, 2^15106001661 is an apocalyptic number.

It is an amenable number.

15106001661 is a deficient number, since it is larger than the sum of its proper divisors (10697358339).

15106001661 is a wasteful number, since it uses less digits than its factorization.

15106001661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59803 (or 59797 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The spelling of 15106001661 in words is "fifteen billion, one hundred six million, one thousand, six hundred sixty-one".