101478661 has 4 divisors (see below), whose sum is σ = 107448012. Its totient is φ = 95509312.

The previous prime is 101478659. The next prime is 101478697. The reversal of 101478661 is 166874101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 166874101 = 61 ⋅2735641.

It can be written as a sum of positive squares in 2 ways, for example, as 38514436 + 62964225 = 6206^2 + 7935^2 .

It is a cyclic number.

It is not a de Polignac number, because 101478661 - 2¹ = 101478659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101478631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2984650 + ... + 2984683.

It is an arithmetic number, because the mean of its divisors is an integer number (26862003).

Almost surely, 2^101478661 is an apocalyptic number.

It is an amenable number.

101478661 is a deficient number, since it is larger than the sum of its proper divisors (5969351).

101478661 is an equidigital number, since it uses as much as digits as its factorization.

101478661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5969350.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 101478661 is about 10073.6617473489. The cubic root of 101478661 is about 466.4354777203.

The spelling of 101478661 in words is "one hundred one million, four hundred seventy-eight thousand, six hundred sixty-one".